Question about 2003 Buick Regal

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Why does my 2003 buick regal ls stop ideling afer it warms up?

When you start the car it idels for about 8 minutes then the engine starts missing badly.evenuatly the engine stalls. when the engine cools it starts runs gets wwarm and stalls again.

Posted by Anonymous on

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  • Buick Master
  • 9,324 Answers

The automatic idle control valve may have stopped working or the control module that operates it.

Posted on Nov 22, 2016

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 8 Answers

SOURCE: 2002 buick regal vibration

Could be several things, check the following: engine mounts, transmission mounts, transmission universal joints. If its not these then you may have a bad misfire?

Posted on Nov 04, 2008

  • 2 Answers

SOURCE: fans run constantly

Irwinr12 is right, no amount of fan will keep the Regal from warming up if the thermostat is working properly, Replace it. Clear SES light with OBDII tool & you should be good to go. BTY its the car computer that keeps the fans running, and they will continue to run until you clear the code. Any kind of cooling/overheating proiblem will kick in the SES light and set both fans running. I own '01 GS, my son has '03 GS and we have both complete set of service manuals. Trust me, do what I say. Batman

Posted on Mar 11, 2009

  • 107 Answers

SOURCE: 1991 buick regal starting and running problem

Sounds like your car is overheating. If you have a temp gauge it should show that. If you just have an idiot light, by the time it comes on it's already too hot to operate. AFTER the car is cooled down, open the radiator cap to see how much coolant has been lost. Chances are there is alot missing. Add WATER (no sense in adding coolant if it's going to leak out) and idle the car at home. Look underneath as it warms up to find where the leak is.

Posted on Apr 05, 2009

BNUTZBCRAZY
  • 130 Answers

SOURCE: 1994 Buick Regal Gran Sport shuts off once engine warms up.

it might be a bad ignition moduale. or could be a bad ignition coil

Posted on Jan 15, 2010

ftw1952
  • 10319 Answers

SOURCE: I have a 1991 buick regal stalls and shut off after warming up

egr valve is not opening up when the engine reaches it normal operating temperture

Posted on Feb 07, 2010

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Idels fine when cold if I run it about 5 miles it starts to miss end wont idel then dies


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Starts but will not idle


Most Lesabre have the 3.8 engine. The engine has a device called an automatic idel speeed motor or AIS for short. It's held on with two torx 20 screws and a 4 wire electrical connector on the side of the Throttle body. BUT BEFORE YOU GO REPLACING THIS DEVICE THAT CAN COST OVER $50. Try this first. Don't drive the car around this way just test it! Remove the big vacume hose from the power brake booster and put your finger over the end of the hose going to the motor. Have an asstant start the car and hold the gas so it'll keep running, trying to go as slowly as they can. Slowly remove your finger from the end of the hose and the motor should pick up speed. you should be able to get a good idle with your helper completly of the gas. if you do the idel motor is'nt working ( right) so your not done checking. Let's say you can't even get a fast idel that stays. The timing chain needs checked and other vacume or engine control codes need checked. Has the check engine light been on? ( with the engine running) . If it has the idel motor will set a code as will a cam senser and all the other sensers on the car. Follow code charts if a code is found. Most auto parts stores will check your car for free for codes but their recomendations very with the experience for the operator of the tool, and if they were good enough to make the mechanics money why are they in a parts store? If you can acheive a good idel playing around with the vacume hose then put it back on and go to the next step. Remove the Idel motor and clean it and the hole it came out of with oven cleaner. Just like cleaning an oven don't get it on you or the wiring part of the motor. With an OHM meter the pins will show two different pins hooked together ( two Pair) If you get only one it's bad. Every pin is connected to just one other pin. If not it's bad. You can get new cheap ones that are bad. I use cheap ones and cross my fingers. If they work the first time their good for a long time. Then you have to learn the idel. Try to learn the idel with the old one cleaned first. Start theengine and hold the idel with the gas pedel. after holding the speed at 2000 Rpm for two minutes ( a good engine will do this easy) let off slowly it should idel down slowly then (catch) and speed back up on it's own. If it does your fixed and go on your merry way.

Feb 15, 2010 | 1999 Buick LeSabre

1 Answer

Rough idle then stalls


Vacume leak or bad idle motor. With the car in park and running with the hood open listen for leaks moving your hand around the different hoses looking for a change in the sounds that you hear. The idel motor also makes the car idel up to 1500 RPM or so right at start-up then idel down, If it doesn;t the idel motor is likly. Check engine light is on when running? Test for codes, Follow code test charts don't skip any steps!.

Nov 02, 2009 | 1998 Chevrolet Malibu

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8 hp mercury motor starts and idels works fine at


Sounds like you need to service your carb as the mainjet is probably partially blocked or you have a choke thats not opening properly or a blocked filter.

Sep 15, 2009 | 2003 Mercury Mariner

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Ideling 1600 rpm onlywhen engine warm


please change the idling switch control valve assembly plus the sensor!

Jun 18, 2009 | Mercedes-Benz SL-Class Cars & Trucks

1 Answer

2002 buick regal vibration


Could be several things, check the following: engine mounts, transmission mounts, transmission universal joints. If its not these then you may have a bad misfire?

Nov 04, 2008 | 2002 Buick Regal

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