Question about 2002 Buick LeSabre
Everytime we first start our 3.8 engine, it kills, then it usually restarts fine and runs good. If you catch it by pushing down the throttle right when you start it, it may continue to running without killing.
There are 3 things that cause this, 1st and most common is a dirty idle speed control valve, 2nd is carbon on the back of the intake valves, last but not least is the wrong octane of fuel, if it requires 89 Octane and 91 or 92 is used the engine will stall code.
To clean the dirty idle control valve follow this procedure:
Here is the most common cause of surges and stalls, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
Posted on Nov 22, 2008
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
May 08, 2014 | 1994 Pontiac Trans Sport
Apr 07, 2014 | Chevrolet Suburban Cars & Trucks
Oct 27, 2013 | Volkswagen Cars & Trucks
Engine stalls or RPM
fluctuates at idle up and down or dies near idle.
This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control
Oct 15, 2012 | 1996 Mercedes-Benz C-Class
Feb 03, 2018 | 2003 Mazda Mazda6
Jan 27, 2010 | 2002 Mitsubishi Lancer
Aug 02, 2009 | 1996 Cadillac DeVille
Jun 22, 2009 | 2004 Dodge Ram 1500
291 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: