2004 deville idle problem Cleaned my intake and throttle body. Recently had the plenum changed, TB cleaned, and IAC cleaned. Now skipping on one and six at an idle Bad. Replaced my IAC and TPS. May 14, 2009 Common 2004 Cadillac DeVille problems; My 2004 cadillac deville is shaking in a low idle why is that When i slow down and come to a stop its the only time that it does that that plz help Posted by gdnation101 on Apr 04, 2013 Oct 8, 2024 · There is also the TPS, throttle position sensor tied into this system. Table of Contents Diagnosis Causes Shakes Oct 1, 2020 · Thanks for all your guy's help, I've been working through some idle problems for a while so it's nice to know that it's working right. I'm also presently dealing with a hi speed surge or miss in the engine at a steady cruising speed, 65 mph range. I cleaned and verified the injectors are working. Car cranks fine when cold. I couldnt find anything wrong with it so I took it to a mechanic. The most common cause of a rough idle is misfiring. 15-30-34-52-53 15 - Open coolant sensor circuit 30 - Idle speed control circuit 34 - MAP signal too high Oct 15, 2008 · It will always idle at around 550rpms in drive at a full stop irrespective of the TPS setting, but the TPS setting affects idle speed above about 5mph. I adjusted the timing to 12' because I always run premium (I run it in my '04 2500HD with the 8. I ordered a new ECU but dont have it yet. 4K views 10 replies 3 participants last post by cef2lion Jul 25, 2018 Sep 15, 2010 · Cadillac DeVille Rough Idle Due to EGR Valve Sticking Open - 100 reports. 6 Northstar motor. 6L * Powertrain Control Module (PCM) 65,000 miles : Powertrain Control Module (PCM) If a problem is found, repair as necessary. 4. Had a guy look at it who has sold used cadillacs for 30+ years and he kept saying 'electrical problem' but wouldn't provide any real ideas. 3. When this happens, your car may experience drivability issues such as stalling, lack of power, rough idle, and hesitation. Feb 1, 2010 · I just wanna post this for people with idle problems. Then it starts adjusting incorrectly making the engine run bad. No 300 or 171/174 Rich / lean code. There should be none. The fans work and the radiator is not Dec 14, 2013 · Re: 2004 Cadillac Deville rough idle Your engine has no spark plug wires. I checked all vacuum hoses and replaced a couple…including the intake coupling. I've read other threads where folks talk about the crank sensors - but apparently they're not the cause of my problem as mine were just replaced - Help! Nov 17, 2013 · Idle problems - 2001 ETC 2001 ETC with 69,000 miles. There is also the possibility of a faulty idle air control valve but usually this would cause an idle problem when vehicle is under load at idle in gear. I'll make sure to come back if anything persists Apr 5, 2005 · This is the most informative information I have ever received regarding this problem. I pulled the codes and it showed these : Feb 11, 2016 · Re: 2004 Deville DHS P0300 Random Misfire ===== post the Current codes - -----if you have the P0300 - generic misfire - go to any big auto parts store and have them check the codes - P0301 is cylinder #1 - P0302 is #2 - P0303 is #3 - etc - once you know which cylinder is causing the problem - diagnosis becomes much easier - Dec 13, 2018 · The P0507 code is related to your Cadillac DeVille’s idle air control system. Apr 18, 2013 · I just solved my high idle and rough idle on my 02 DeVille today by replacing the intake manifold "coupling" gasket, or as it's called here the plenum gasket. Told a friend of mine who was having the same problem with his Cadillac and it solved his problem. 1L big block, fun truck). If it's chewed up, there will be play between the camshaft drive gear and the distributor gear at idle. The surge is fast, about one second, and varies from ~4000 RPM to 5500 RPM. Went online and saw some that ranged from $20-$225; Of course AC Delco is the way to go but at this point I don't feel like paying $200+ for that part. 860 posts · Joined 2004 I cleaned the throttle body still having idle problems idle in drive i a 100 rpm off then wut it is in Dec 17, 2011 · 2001 deville idle problem. Sep 5, 2012 · Re: 2004 CADILLAC DEVILLE DHS keep pulling code . Nov 4, 2024 · Informal Lounge, Introductions, General Discussion Seville and Eldorado Forum CTS First Generation Forum - 2003-2007 FWD DeVille 1985-2005, Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion Sep 13, 2015 · My 2004 Deville CTs Northstar has problem with engine dying when I stop to turn and the engine slows to idle speed! The extra load of the power steering pump overloads the idling engine! Any theories? 1 Answer. 7:1 sweet spot, this can cause your Cadillac DeVille to misfire. 2 Chinese and 2 delphi. Sep 12, 2012 · How can I tell if a leaky FPR is the problem. Apr 7, 2012 · I replaced the TPS, yesterday, I want to pinpoint this problem, If the TPS does not repair the my high idle concern, the only component left is the PCM. Common 2004 Cadillac DeVille problems; Feb 20, 2020 · I have 03 deville I'm working on and at idle the fuel pressure is 38ish and at WOT it is 44ish. Anyway, TB cleaning and a new TPS didn't fix it. Could not detect any leaks. It uses C-O-P (Coil On Plug) ignition. Jan 9, 2015 · No, the chains are not your idle speed problem. It has the 4. Just like the other answer, the failure will turn on the check engine light and with a check engine problem the cruise will not engage. P0171 - Fuel Trim System Lean Bank 1 Oct 26, 2012 · SOURCE: 1994 Cadillac DeVille that is intermittently The idel motor has gears in it that wear out. I pulled the codes and got a P0303, cylinder 3 misfire. Electrical Issues. 860 posts · Joined 2004 I cleaned the throttle body still having idle problems idle in drive i a 100 rpm off then wut it is in Feb 11, 2016 · I have a PCM P0121 Current code and my car won't idle and stalls. Feb 16, 2011 · DeVille / 2004 / idle air control valve; Idle air control valve. This problem is worse in town than on the highway. 6 engine that runs really rough and has a surging at idle. p0171 and p0174 There are two terms used that need to be in correct context: GM/Cadillac uses the term "plenum" for the rubber/metal connector between the throttlebody and intake manifold on the 2000 and later FWD Northstar engines. Bad Water Pump. This sets the base idle speed to a place where the valve can have full control. Has a rough idle but drives out smooth. Never had this problem before. low rpms from 450 -700 after warm up. I finally replaced the IAC valve and the problem was solved. I did not see a problem with the distributor ground. Isolated injector on #4 cylinder as a potential problem and replaced the injector with a slight improvement at idle but still random misfire. , post here and a moderator will move the thread as-is. Jan 17, 2020 · Sounds like it is operating as designed. I've read of other temporarily disconnecting the idle speed valve too see if that corrects the problem etc. alldatadiy. Feb 5, 2008 · Re: 03 Deville rough idle/ Plenum surgery Plenum surgery done patient is doing Excellent plenum had a 3" tear on the bottom i broke a couple of those cheap plastic vacuum hoses and lost a injector o ring:banghead: but autozone helped with that, found a match from another vehicle. there is a rubber collar around the valve cover off the throttle body that was sucking in air , i sealed it , still the problem with the high rpms during braking . Although I haven't attacked all my oil leaks to the extent you did, my 1999 Eldorado ETC displays similar symptoms your Deville has, alert lights, hi idle . It's balls out. I couldn't idle. Apr 12, 2020 · I have a 2004 Cadillac deville I have change the water pump and the thermostat flushed out the heater core and put in a new radiator and I am still overheating at an idle when I press on the gas and rev the engine the temperature does go down but as soon it is at an idle it goes back up my antifreeze is full and I do have Flow and I do not have heat unless I am stepping on the gas and revving Oct 17, 2024 · My 2004 deville has had an idle issue for a while now. Was a problem found? May 12, 2014 · Informal Lounge, Introductions, General Discussion Seville and Eldorado Forum CTS First Generation Forum - 2003-2007 FWD DeVille 1985-2005, Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion Oct 8, 2009 · This 1997 Cadillac Deville came in with the complaint that the idle speed would sometimes be okay but most of the time as the engine warmed up it would get progressively higher and higher until the engine would run at about 3000 rpms on its own with no throttle input. Mar 29, 2013 · SOURCE: 2004 deville passenger front and rear power windows hello there: you may have to disassemble the door panel and check to see if the cable going to the actuator has come off if the cable is there and mounting looks OK you may need to replace the actuator its a simple procedure to do and it's just as expensive to replace the motor and actuator together at the same time the reason for Nov 24, 2011 · Re: 2002 Cadillac Deville DTS Idles High and throws code I have a similar problem with a 96 deville with the 4. Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion Jun 5, 2015 · Idle Control Valve Reviews - 2004 Cadillac DeVille Delphi | W0133-1686213 Delphi part was oem for Cadillac. She still won't start. The most common reasons a vehicle shakes when idling is a misfire or bad motor mount. ECT . No codes set. Please don't hijack an established thread: Start your own with your car/year/model/problem. May 28, 2017 · Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls The Cadillac DeVille Idle Control Valve performs in conjunction with the engine's computer to actuate a valve which maintains motor idle RPMs. It has a history of overheating if the outside temperature is 90+ degrees fahrenheit. Then recently the alternator went out. 1000 at parking This problem made the car accelerates by it self a little faster ,,,, and although my foot over brake Pedal it only decrease to 850 rpm and never below that Oct 21, 2024 · My 2004 deville has erratic idle and weak performance caused by the IAC valve. Computer had zero codes so started searching posts. At below 1500 rpm it idles rough and surges. I did check the timing again and it was set right at 10'. Customer: I got a 2004 Cadillac Deville it was running hot I changed the water pump radiator thermal Stat and cooling temp sensor still running hot fans working great I just changed oil 3 days ago reset the gage to 100%life left after it ran hot it went to 0% radiator was still cool and could take the radiator cap off no bubbling why still running hot Jul 6, 2021 · My 2004 caddy deville with 48,000 miles has rough idle in morning after sitting, really only at 1200 rpm's and small coolant leak. The replacement unit I purchased from NAPA came with the 8 intake runner gaskets too. I have 4 IACs for this car. Vehicle speed. When tryn to start it will fire up then emediatly die unless I start to feather the throttle. This causes a high coolant temp. 9, etc. https://onlineautorepairvideos. Had it replaced and bam. They all work great until you take it on a long drive. On a scale of 10, I would give this job a 3, if that. E26 Shorted Throttle Switch Signal E97 P/N To D/R Engagement Problem E98 P/N To D/R ISC Engaged Problem Oct 9, 2019 · Informal Lounge, Introductions, General Discussion Seville and Eldorado Forum CTS First Generation Forum - 2003-2007 FWD DeVille 1985-2005, Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion May 14, 2009 · Idle on 2004 Cadillac Deville. My 2004 Deville CTs Northstar has problem with engine dying when I stop to turn and the engine slows to idle speed! Jul 12, 2012 · Informal Lounge, Introductions, General Discussion Seville and Eldorado Forum CTS First Generation Forum - 2003-2007 FWD DeVille 1985-2005, Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion Aug 11, 2018 · Misfire– If the air-fuel mixture has gotten too far from the 14. May 11, 2023 · Correct spark plugs on a 2004 Cadillac Deville. Jun 8, 2017 · FWD DeVille 1985-2005, Fleetwood, and 60 Special 2002 DTS Idle problems. Sep 7, 2019 · It can be very jarring when your Cadillac DeVille shakes when idle. sometimes it will come back down and fluctuate between 1800-2500rpms. The car started to stumble and stall and hesitate then all of a sudden the engine started to race and run at like 2000-2500 rpm we did find a vacuum leak and fixed that. Mar 18, 2018 · I work on the Deville today changing the plenum to get rid of the P0171 & P0174. These will be an exact fit and will match the required specifications of your engine. Mar 25, 2011 · I have a 97 Deville with the 4. plug in the system and the rpm 's are so low 500-650 , the engine will stall. Sometimes the idle RPM will not go back down below 1100. 2003 Cadillac Deville, 4. Pick up a couple, make sure Oct 18, 2015 · 97 Deville Idle Problem. The miss was resolved by changing spark plugs but the coolant leak turned out to be a freeze plug in the right head. 0L 4. helminc. The worn distributor gear will also cause a similar problem. Just before putting it away for the severe winters I have in my city the car started to have the low idling problem on start up. Oct 17, 2024 · My 2004 deville has had an idle issue for a while now. i have done some work already to several systems to try to fix the problem. P0300 code pops up. When/if I can get the car to start it increases the idle to very high (5500 rmp) and surges. Jan 18, 2021 · At close loop idle, if around sealevel, MAP should read about 35 KPA, MAF reporting about 1 lb/min ( about 2,800 Hz) and TPS reporting about maybe 7% angle opened If bad plug,wire or coil then problem would be all the time and not random or cause SMOG functions to trip DTCs Aug 13, 2014 · After researching the internet I decided to replace the TPS (throttle position sensor) since it was a fairly inexpensive part ($34) and this didn't solve the problem. My temperature gauge was rock solid at the half mark, like it normally is. 15-30-34-52-53 15 - Open coolant sensor circuit 30 - Idle speed control circuit 34 - MAP signal too high May 14, 2009 · Idle on 2004 Cadillac Deville. After I got new plugs in the problem got significantly worse. you can try that the isc motor is on the throttle body usually close to the TPS the idle motor for your car is actually about $90 it looks like the pic in this post. 2003-2007 FWD DeVille 1985-2005 May 29, 2013 · I have a 2004 Deville that I recently took to my local Cadillac dealer for an oil leak repair. Customer: Problem – Intermittent fast idle. Oct 12, 2005 · My 95 Deville had gone badly like that, this problem can still exist after changing the following: - ISC motor - TP Sensor - Catalytic Converter - Muffler - Clean the blades in the air intake - O2 sensor, This problem wastes a lot of Gas because the car is constantly wants to drive on it own, and also works your brakes. Engine load - based off of MAP/MAF. I just swap it with a different one and it runs good again. (40 - 45 psi), but I doubt it is low enough to cause your problem. thanks parts geek. What gives with this? Also, it "hunts" 3 or 4 times for curb idle before it settles down. If your DeVille has this problem, many issues can cause it. 00). This will cause erratic timing. Jump to Latest 2003-2007 FWD DeVille 1985-2005, Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion Dec 13, 2010 · Was having the identical problem on my 2003 DeVille. Looking for ideas on how to correct this problem. Jun 11, 2009 · 2004 northstar low idle after warm up. Also maf sensor is ok and no vaccuum leaks Mar 30, 2015 · I might have to change plenum boot on my 2004 Cadillac deville,, past week has been low idle in morning and after driving 20 miles to work i park and its idle high 2000+rpm,, i already replaced the pcv dirty piping vacuum i found leaking,replaced air filter,fuel filter, took off the iacv and cleaned with electro cleaner and i cleaned throttle body,, . Yup, that's it. Today I started my car and it has a really bad misfire. Learn about this problem, why it occurs, and how to fix it. What is the code it threw for the rough idle?” My 2004 is out at my Mom’s as another family member is using it but if my mechanic does not solve that problem, I will ask him for all codes and post them. The EGR valve is new but it's some no name Chinese brand. then after a few seconds of this it will suddenly jump to 25-2600 RPM and hold there. After driving 15 minutes and the engine gets hot when you switch off it will not crank. May 14, 2009 Common 2004 Cadillac DeVille problems; Aug 18, 2011 · 2004 Deville (rebuilt) 115k miles. This is a great option for any 2004 Cadillac Deville: Denso IT16TT Iridium TT Spark Plugs 4713-4 PK For any 2004 Cadillac Deville, you can use DENSO 4713 spark plugs. smoke tested for leaks and found none. If a problem is found, repair as necessary. Nov 16, 2015 · Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made . Has a misfire at idle after warming up. If you feel this will get better response from Engines; 4. 2004 Deville stalling, idle jumping high then low. . Oct 19, 2005 · All I did was unplug the egr valve and my problem was solved. It was the half block which didn't make me happy ($4000. When accelerating you can feel the loss and gain of power as the IAC adjusts. Dec 28, 2016 · I experienced the p0121 on my 2004, but the symptoms were different. Nov 13, 2014 · I am receiving a P0121 TP Sensor Circuit Insufficient Activity code on 2004 Deville Northstar. It would idle around 625 before stalling. Feb 10, 2014 · I have a 2004 Cadillac Deville with 142k original miles. When you slow to a stop sign, it seems like curb idle doesn't occur till after you stop. The engine design makes a lot of what would be simple repairs into labor intensive and expensive repairs. However, after about 5 minutes (switching to closed-loop operation?), almost as if flipping a switch, the idle becomes very rough. At times the car will attempt to idle around 500 rpm and other times it will be in gear and the rpm's will be up around 1,500 without the accelerator being touched. I cleaned all electrical connections. I changed the plugs(pic) change air and fuel filter. 6L Northstar engine. Jun 20, 2013 · Informal Lounge, Introductions, General Discussion Seville and Eldorado Forum CTS First Generation Forum - 2003-2007 FWD DeVille 1985-2005, Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Or as you're driving along and you let off the accelerator it will continue to pull. When the injector doesn’t close properly, excess fuel may enter the combustion chamber, creating a strong fuel odor and potentially wasting fuel. Caddy dealer said crossover gasket leaking and spark plugs, charged 1200 dollars. The engine idle may be unstable or a DTC may set if the idle position is not learned. Nov 5, 2012 · Next day after driving the car under strong rains ,,, high idle problem came up. If CASE has not been learned, check for the presence of other power train codes. 6 and metal fuel rails. I took it to a mechanic just last week got one coil replaced and 3 spark plugs replaced it cost me $580. When the vehicle is idle, the water pump is turning slowly. 4/ Start the engine and adjust the idle speed screw until the engine idles at 650 rpms. 000 miles on it car has been great for me until we have had this problem here is the problem: tech-tips/167181-tb-iac Sep 25, 2019 · I have a 2004 Cadillac Deville. Sep 30, 2017 · Low idle and it'll quickly fade out around 350 rpms, high idle around 1200 rpms. Jun 5, 2015 · Idle Control Valve Reviews - 2004 Cadillac DeVille Delphi | W0133-1686213 Delphi part was oem for Cadillac. Power steering switch . My 2004 Deville CTs Northstar has problem with engine dying when I stop to turn and the engine slows to idle speed! Oct 18, 2015 · 2004 DeVille Base 87,000 miles. Took it in to the mechanic and got diagonosed with a bad AICV. Apr 5, 2005 · This is the most informative information I have ever received regarding this problem. Downshifting to run the engine (and water pump) faster will cool it down temporarily. If you have been reading my other posts, my DTS is a idle monster. Learn More #2: Hub Spindle, All Bolts Broke Off, Wheel Fell Off 2004 DeVille Jun 9, 2020 · 2004 Cadillac Deville DHS 238k miles Bought at 100k miles, owned for seven years. com. Also checked FPR. BEWARE OF SCAMMERS. Dec 22, 2009 · Informal Lounge, Introductions, General Discussion CTS First Generation Forum - 2003-2007 Seville and Eldorado Forum FWD DeVille 1985-2005, Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion Jan 11, 2010 · Informal Lounge, Introductions, General Discussion CTS First Generation Forum - 2003-2007 Seville and Eldorado Forum FWD DeVille 1985-2005, Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion Apr 11, 2016 · FWD DeVille 1985-2005, Fleetwood, and 60 Special Will be vacuum leak at idle problem . You need to either find a real GM/Helm serfvice manual set (eBay or www. Jul 15, 2021 · Dark Mode; Light Mode; menu Log in Jan 19, 2012 · Informal Lounge, Introductions, General Discussion Seville and Eldorado Forum CTS First Generation Forum - 2003-2007 FWD DeVille 1985-2005, Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion Mar 7, 2013 · my 97 Deville is running really rough at idle. Easy to use parts catalog. In warm weather it runs fine but in cooler weather it idles at 1900 and higher and won't idle back after acceleration. It only happens when the car is good a Oct 5, 2013 · Informal Lounge, Introductions, General Discussion CTS First Generation Forum - 2003-2007 Seville and Eldorado Forum FWD DeVille 1985-2005, Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion Nov 3, 2018 · If you own a Cadillac DeVille, you may have encountered the P0102 trouble code. 6L * Idle Air Control (IAC) Motor 115,000 miles : Idle Air Control (IAC) Motor : January 29, 2009: 2003 Cadillac Seville, SLS 4. Could it be a coil pack? Again no P300 code and no P301 ect code (Autozone OBII). Aug 25, 2014 · My son works at the dealership where it was "repaired" and is taking it back in this morning - after spending 800. I removed the fuel rail to change the plenum and I think that’s where the problem is. GM had a bad supplier. received 3 days sooner than expected. Unless I hold the accelerator down to increase the RPMs when starting cold, the engine will die. I thank everyone for this site!!! Sep 23, 2017 · This was at idle. This is what I came up with. Therefore, the biggest problem with the Northstar in my opinion is the cost of maintenance and repair. Pull your trouble codes from the car's built-in scanner-reader. Jun 3, 2004 · Just want to jump on this with what I learned with a new to me 2004 deville base model, originally changed crank sensors for codes pulled, then changed fuel pump to get gas gauge working. Cleaned TB, checked plenum at intake manifold and all vacuum lines. • After driving vehicle for about 10 minutes the idle increases to from 1200 rpm to 2800 rpm. Anyone trying to get your money should be checked out BEFORE you send anything anywhere. Engine has been running rough on idle (shaking) for a few weeks now. As a result of the high idle it will keep pulling as you come to a stop sometimes. 5. My 1979 Cadillac Coupe DeVille has a very rough idle on cold starts. Nov 21, 2014 · I have a 2002 Cadillac Deville base model with almost 180,000 miles. Pull the vacuum line while at idle and look for any sign of fuel at the nipple. I'll make sure to come back if anything persists Sep 15, 2023 · I took my car (2004 deville base, 170k miles) to the mechanic a few weeks ago for a power steering fluid leak. Today I was driving it and it missed on me. Study the Acronyms sticky on the main Deville threads page. Sep 20, 2019 · Buy BOXI IACV Idle Air Control Valve for Cadillac DeVille 2000-2005/Eldorado 2000-02/Seville 2000-04 / for Oldsmobile Aurora 2001-05 / for Pontiac Bonneville 2004-05 4. came through again. • It did not do it that often until the last week or so. the RPM are cycling from about 400 up to 900 and back about one cycle per second. I was in stop and go traffic, and while at idle I felt the engine begin skipping and the check engine light came on. The water pump in your car is turned by the DeVille’s engine accessory drive system. Sep 16, 2012 · Hi guys need some help I have a 04 deville base that has smoke rising from back of engine compartment it also has a high idle, usually in the 1200 range at startup and it keeps rising as it heats up sometimes into the 2500 range. Anytime the ECM or the throttle body is replaced, the ECM must learn the idle position. At stops it doesn’t cut off but again idles roughly. (1-2 ticks). It will idle a little rough and occasionally stall out. As soon as it’s cool Mar 23, 2005 · My '90 Deville with 123K runs great (better low end punch than my NorthStar) but I have a couple funky idle problems. I also replaced most if not all vacuum lines on the engine. 00 less than the cheapest part at oreilleys. It hasn't died on idle, though it sounds like its about to. Oct 29, 2014 · I have a 91 Deville with 96k miles on it. Jun 5, 2011 · I have a 2004 Cadillac Deville DHS with 144. They said replace ECU. Jun 24, 2024 · I have a 2004 deville 4. That IAC is common on the 2000 - 2004 FWD Northstar cars. Then the service engine light came on so I drove it home and coded it. I stays at whatever the rpms went up to and accually speeds up. Anyway the base idle was set at 700, obviously way to high and the TPS was reading under 3 volts. was $130. Electrical issues with the fuel injectors can also hinder your Cadillac DeVille’s performance. Worst case would be an intake manifold connector boot (plenum). It has erratic idle only when the AC is turned on. Remove the silver beauty cover and locate the FPR on the fuel rail. Of course the timing adjust did nothing to the idle as expected. Thanks. Nov 21, 2024 · Once the engine has returned to idle, check the status of Diagnostic trouble code P1336. 6L V8 | Replaces 88893284 AC272: Idle Air Control Valves - Amazon. 6 L northstar. Which ties into to the ECM engince control module along with the idle speed control. I cleaned the throttle body (not very dirty), throttle plate and replaced the IAC first, then installed a new TPS. Starts, Dan. Another possibility would be an intake manifold vacuum leak from the seal between the throttle body and the intake manifold. However, when at a red light or stop sign, when the engine was at idle, it would take more effort. This was a intermittent problem that became more frequent. must drive with map unplugged so car - Cadillac 2003 Deville question Search Fixya Press enter to search. The vehicle had a miss on #1 and #3 and a coolant leak. This code indicates that the Mass Air Flow (MAF) circuit is low and not performing within its specified operating range. Feb 21, 2023 · 2004 cadillac deville 156kmiles. Roughly every 2,000 miles, I start to have engine idle and rpm issues. How can I check my pump and or regulator to figure out which one is the culprit. I can only assume the dealer doesn't know how to adjust the base idle or the TPS that they changed 3 times. The idle air control valve (IAC) plays a crucial role in maintaining a smooth idle by regulating the amount of air entering the engine. Worst 2004 Cadillac DeVille Problems #1: Leaking Rack 2004 DeVille Average Cost to Fix: $1,400 Average Mileage: 66,000 mi. I wonder if they might've put some crappy spark plugs in it. If any exist, correct the problem, then repeat this procedure. They fixed it, but while driving it home I noticed it had a rough idle at stop lights. 2. I have replaced the MAF sensor and sparkplugs, and cleaned all the air intake parts,,but it still does thing same thing and the check engine light is still on. Idle Speed Control motor is fairly new. Finally, I changed the IAC ($60 Delphi on amazon) and it resolved the issue. Aug 29, 2019 · If you own a Cadillac DeVille and it’s idling rough, you may be feeling frustrated. Dec 17, 2011 · 2001 deville idle problem. CONDITIONS FOR RUNNING THE IDLE LEARN PROCEDURE Jul 17, 2018 · 2004 Deville Overheat issue Jump to Latest 2. Seems to run OK after about an hour, otherwise Apr 23, 2011 · I still can't find the answer to the problem of my car! :banghead: Last year was the only year i've had problems with my 2001 Deville base model. Yes, I did disconnect the battery too after replacing the part. My 2004 cadillac deville is shaking in a low idle why is that When i slow down and come to a stop its the only time that it does that that plz help Posted by gdnation101 on Apr 04, 2013 Oct 8, 2024 · There is also the TPS, throttle position sensor tied into this system. If it were a something else I would think this wouldn't fix it. Battery voltage. Swap spark plugs and coils. Sounds like the angry person inside the motor wants out. Now I have a new problem hesitation at idle. No SES light. The result was a bust because after a couple minutes of squeezing the bulb, the coolant level rose too high and contaminated the block tester. Start the engine and adjust the idle speed screw on the throttle body, using a screwdriver, until the engine idles at 675 rpm. grandsons Cadillac back on the road. I pulled the codes P0171 & p0174, my first instinct was to replace the spark plugs since they were overdue. Asked by rodys in Loxahatchee, FL on . Apr 22, 2014 · As far as the coolant/condensation issue goes, have the system tested for exhaust gasses in the cooling system. There are Cadillac Deville: 04 deville intermittent problem. com/vide Jul 25, 2010 · Informal Lounge, Introductions, General Discussion CTS First Generation Forum - 2003-2007 Seville and Eldorado Forum FWD DeVille 1985-2005, Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion Apr 8, 2012 · I just purchased a 91 DeVille hearse. com FREE DELIVERY possible on eligible purchases Nov 15, 2016 · My 2004 Deville CTs Northstar has problem with engine dying when I stop to turn and the engine slows to idle speed! The extra load of the power steering pump overloads the idling engine! Any theories? 1 Answer. It only has 47,000 miles on it and everything is in great shape except that it seems to have a problem at idle. No adjustment necessary, the computer will do it all for you. RPM counter stay at 1100 while in N ,,,, and approxim. 4 Mar 6, 2004 · The engine control module (ECM) learns the idle position of the throttle body to ensure the correct idle operation. Once it is warmed up, it will maintain a 650 RPM idle with a slight varation of + / - 75 RPM. Asked by Al Tirre in Rock Springs, WY on . So more than likely that code is causing the rough idle? Sep 16, 2024 · If you unplug the IAC while idling at 650rpm the issue is magically fixed and the idle doesn't change from 650. Found this post, cleaned the TB & IAC and what I thought might be an expensive problem has been solved. in neutral or in any gear. When I dropped the RPM back down to idle it was again more difficult to turn the wheel to the left and right. Replace BOTH sensors. Solution: A bad water pump isn’t efficient Feb 7, 2017 · Question about my Deville. 6. Car did not overheat on me. In this article, we’ll look at some of the most common causes of a rough idle in the DeVille and how to fix the problem. As this 2004 Cadillac Deville features an 8 Feb 2, 2021 · Here’s more on this: Cadillac DeVille: Bad Thermostat Diagnosis . When raising the RPM up just a bit (maybe 200 RPM) it felt normal. I've been having trouble lately with it on idle; RPM's would either rev high or low. Sep 15, 2021 · While most of the problems we mentioned sound relatively easy to fix, they aren’t. Checked all sensors with no issue. Did you change the fuel filter? That's probably the first thing I would have done. Nov 11, 2012 · Re: (95 sedan deville problemplease help This will get better info and answers in the proper Deville forum. Aug 22, 2006 · Fuel sample at filter was clean and no water. It idles perfectly when first started cold. 00 only three days later and the shaking at idle has returned no service engine light like before I took it in. They said they couldnt find anything wrong either but the ECU is giving bad outputs. Be ready for P 0171 - P 0174 You're probably in the TB and IAC cleaning mode. Aug 23, 2007 · Replaced Intake Manifold. We've lined out some of the most common causes below. The following picture shows the … Continue reading "1997 Cadillac Deville, Erratic / High Idle, Code P0507" Dec 1, 2012 · I have a 2001 Deville that has a rough idle problem. It was also determined the timing set was totally trashed and required replacement. The PCM determines the idle speed/IAC counts based off the following inputs: 1. As the engine rpm increases, so does the speed of the water pump. I changed spark plugs, coil packs, fuel pump,crank position sensors, cam sensor, new battery. Cadillac DeVille Idle Control Valve - Idle Valves - Replacement Delphi DIY Solutions Standard Motor Products AC Delco Wells API - 2004 2003 2002 2001 2000 2005 1998 1996 04 03 02 01 00 05 98 96 - PartsGeek Jan 17, 2025 · Informal Lounge, Introductions, General Discussion Seville and Eldorado Forum CTS First Generation Forum - 2003-2007 FWD DeVille 1985-2005, Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion Jun 18, 2013 · I am working on a 2000 cadillac deville, Problem is that the car will not idle correctly. Mar 21, 2015 · I have a 2004 cadillac deville with the 4. no matter what the check engine light is on for. Mar 31, 2009 · Unplug the electrical connector from the valve. Sep 23, 2024 · Informal Lounge, Introductions, General Discussion Seville and Eldorado Forum CTS First Generation Forum - 2003-2007 FWD DeVille 1985-2005, Fleetwood, and 60 Special 2004-2007 CTS-V General Discussion Mar 18, 2011 · P0385 - Crankshaft Position (CKP) Sensor B Circuit Common problem on 2000-2003 engines. Was a problem found? — Go to Step 24: Go to Step 9: 7 : Is Long Term FT significantly in the positive range (Lean condition)? — Go to Step 8: Go to Step 9: 8 : Check items that can cause the engine to run lean. This forum has been a lot of help with diagnosing and fixing the problem too. 2004 Cadillac DeVille. If the scanner indicates that the CASE has been learned, the relearn procedure is now complete. After they re-sealed the half block and replaced the valve cover gaskets, I drove about 5 miles, stopped for gas, and when I went to restart it, it was running in full rich mode, puking gas Mar 28, 2022 · Video on diagnosing a 2000-2005 Cadillac Deville with the 4. Discover more answers I have a 2002 Cadillac DeVille with only 38,000 miles on it. Apr 5, 2022 · This is a 2004 DeVille with 134,000 miles. Jul 16, 2019 · A leaking fuel injector can cause an array of problems for your Cadillac DeVille. Cold start, fast idle should be around 1200 RPM for about 30 seconds or so, then drop to around 900-1000 til it reaches a predetermined temperature (I forget exactly what it is), then it will drop to normal idle (650). I had three codes, 2 for O2 sensors and one for multi-cylinder or random misfire. Feb 5, 2007 · I'm curious about this thread too. It has 175k never had any problems. When driving with the AC on it gave code P0404, exhaust gas recirculation control circuit range/performance. TPS, IAC, MAS, are all brand new OEM. All kind of stuff happening. - I am having an intermittent high idle problem on a warm restart. 9 and appears stock. on this problem alone (crank and idle sensors) I'm getting pretty peeved. Idle Issues– With the air/fuel mixture altered, the vehicle can idle erratically as the computer compensates to keep the engine running. PCM P0121 - Throttle Position Sensor / Switch A Circuit Range/Performance Problem. Jan 23, 2012 · - Slamming the right hand side passenger door would temporarily fix the problem - Tapping on the blower motor metal housing with the handle of a screw driver would temporarily fix the problem - Wiggle the blower motor power source - Blower motor turns on and off - Wiggle the housing - Blower motor turns on and off Nov 25, 2014 · Test #1: I let the engine idle to warm temperature. Sep 6, 2021 · 2004 Deville P 0300. It’s essential to maintain your DeVille’s idle air control system to optimize engine performance and fuel efficiency. New fuel pump died in 3 months and installed new fuel pump and car died randomly when taking left hand turns. For the 2000-2004 engines it's P/N 12555840 Customer: I have a difficult-to-diagnose rough idle problem with a 2002 Cadillac Deville with the 4. please help , we though it was a brake problem and replaced alot of those parts with still the problem. Temperamental is the best way to describe this engine. Jun 22, 2010 · The idle air control valve may be sticking on your 2004 Cadillac DeVille causing an erratic engine speed. com) or subscribe the car to a multi-year access to www. I test drove the vehicle and it felt normal (easy). Nov 12, 2015 · I have a 2004 deville that was having misfire issues. • It won’t idle normal again until it has been turned off for a while. ezpv krfmij mxpqmbcw etaoy mpwgb rpl ljmhgvl wek knds wlylo

2004 deville idle problem. TPS, IAC, MAS, are all brand new OEM.