Question about 2000 Buick LeSabre

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High idle, 800 warm 1300 cold, how to adjust lower------what are normal numbers?

High idle setting jolts transmission when reveres selected.

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Idle is set by the coolant temp. sensor. You could try to clean the throttle body plate with combustion chamber cleaner.
hope it helps

Posted on May 09, 2014

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  • Buick Expert
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Those numbers appear to be in the normal range, possibly a bit high? Since adj are all computer controlled, I would suggest removing the air intake hose and inspecting the throttle body bore for "coking" of built up carbon, which is a common cause of idle maladies...

Posted on May 08, 2014

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6ya6ya
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Posted on Jan 02, 2017

  • 19 Answers

SOURCE: 1997 buick lasabre custom high idle, transmission, stalling

had same problem i would check the Idel Air Valve and also check all of your vaccum hose lines makeing sure there are no cracks or splits in rubber connectors if there is repair immediatelt because over time they start to dammage the internal parts fo the engine and if youve replace tps mass air etc. sounds like a vaccum hose problem

Posted on Feb 10, 2009

honeymokey
  • 3113 Answers

SOURCE: My fan/blower won't run on high setting. It works

Replace relay under blower motor, under hood.

Posted on Jul 06, 2009

alicantecoli
  • 22095 Answers

SOURCE: It idles high when it's warm and won't start when

change the auto choke temperature sensor ,its in the head somewhere ,but i have no experiance of this model to know exactly where it is ,not many of these here in spain

Posted on Dec 12, 2009

  • 4793 Answers

SOURCE: 1993 park avenue idles high

try redexe petrol additive.could be carbon buildup.when you take to the highway do not use heavy acceleration,but build up speed gradually..could also be sticky throttle cable.....

Posted on Feb 19, 2010

elshaddai159
  • 1016 Answers

SOURCE: My 1991 Buick Regal (3.1 engine) use to start a

Hi,
You need to get your engine coolant thermistor checked and tested. This is what tells the ECM when the engine temperature is at normal working temperature and turns the idle down.
But when the idle won't come down from cold to warm this is usually the main fault.
Hope this helps.
Thanks
Jason

Posted on Jan 28, 2011

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89 dodge shadow. hard start. normal idle cold, fast idle warm. sometimes it wont start until i hear fuel pump activate.


Hello,
The car may be hard to start because it may need a normal tune-up. If the spark plugs are pretty used, they will slowly stop burning as much fuel because the spark slowly gets lesser and lesser. On a cold day the fuel is harder to ignite with a small amount of spark.
Normal idle when its cold means that your cars idle is probably too high. If you lower the idle, the choke on a cold day will keep the idle a little higher until the motor warms and then it will kick back off. If the idle is too high, it will run very rich, smothering itself with fuel, and causing the idle to stay low. When the car warms, its creating better spark when its warm, and with the idle being too high its running at a fast idle.
The car wont start sometimes can be the cause of a few things. If the ground is bad on the fuel pump, it wont make a good connection sometimes for when you turn the key on, the fuel pump dont pump the fuel to the engine. Another one can be that your accessory switch can be loose going to the fuel pump. I think its your ground though. Good luck! Hope this helps.
Have a nice day. -Steve

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it seems that the auto choke setting is maybe wrong or there is a problem with engine management, or a worn part which is sticking.

when cold, the engine should be higher as the choke will be on but a warm up idle of 1200 seem a bit high i would expect around 800 and then on restart if the engine is warm then the choke should be off but the idle being too low indicates one of the above.

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