Question about Buick LeSabre
Typically when the brake booster goes bad an indication would be a rock hard brake pedal that you would have to apply overwhelming pressure on the brake pedal to stop the vehicle if it is leaking vaccum.Something you can easily try would be to temporarily remove the cover over the engine which just requires you to take off the oil fill tube which unscrews like the cap.Take that cover off and follow the air induction tube that runs from your air cleaner to the throttle body.Right on top of the throttle body should be the mass air flow sensor unplug it and start the vehicle too see how it then runs.If it smooths out then there is a definite problem with the mass air flow sensor (maf).It should take just a few minutes to verify this yourself and if it does need the maf sensor replaced it is pretty easy to do as well.There are just 2 tamper proof torx holding it in place.The maf sensor looks like just a rectangle about 2 1/2 inches long x abount 1 1/2 inches. It is a very common problem on these engines. Unplugging will turn the check engine light on. Please feel free to ask any other questions.Will be glad to help out.
Posted on Sep 02, 2010
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Posted on Jan 02, 2017
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