Question about 1995 Buick LeSabre

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Buick lesabre stalling

I am master mechanic working on a 1995 Buick Lesabre. It will stall intermittantly just like you shut the key off. It is not setting any code. When this happens, I can watch data on Tech 2 (scanner) & it will loose communication with the ECM every time it stalls. Also, the volt & SES lights may or may not flash & various relays energize & de energize (some times repeatedly at various intervals). Therefore I do not believe it is a sensor problem. I have tried a new ECM as well as adding jumper circuits for the power feeds & grounds. Nothing seems to work. Any ideas??

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  • yadayada
    yadayada May 11, 2010

    crankshaft poition sensor is my guess.

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Run an inline fuel guage in the fuel line with a clear line, look for bubbles, do this witha an inline spark detector, that should tell you wether its fuel or spark shut down, either of these will not give you a code, i have spent many a day on intermittents, sometimes you just have to go back to baasics

Posted on Nov 18, 2009

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