Question about Buick LeSabre

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I have a 93 buick lesabre upon driving it when i make turns or come to stops at red lights the car shuts off, i thought it was a vacuum problem but changed all the vacuum hoses that i found and changed the inexpensive pcv valve. its driving me nuts literally.

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  • blue02gxr Jul 28, 2010

    thanks and i shall go out side and see if it helps the problem.

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Your car is equipped with a computer controlled engine management system. Scan your computer for fault or error codes (most auto parts stores can do this for you, some will do it for free or cheaper than others so call around before paying for it). The information should pinpoint the malfunctioning components. Your idle speed control motor is what I would look at first and think about replacing. The idle air control valve may just need adjusting but with the car being this old, I think it would need to be replaced, or idle air passage make have been blocked off by excessive carbon build-up. If build-up is the problem, a good removal and cleaning will do the trick or an off the shelf spray cleaner may get the job done as well.

The EGR (exhaust gas recirculation) valve could also cause this concern. EGR is only commanded of idle and if this valve sticks open after driving it will cause an unstable idle or even a stalling. I would first check the idle air control valve though.




Let me know how this works out for you.
Benjamin

Posted on Jul 28, 2010

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