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1991 Buick Riviera Question: why does car stall?

 

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am7179, Trenton, NJ, May 19, 2009, 10:24
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car has about 110,000 miles has only stall 4 times in 2 months

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  • Answer #1

    dandd May 22, 2009, 10:41
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     Master

    There are 2-3 things on theses cars that fail a lot and cause intermittent stalling.
    1 the crank sensor 2 the ignition module and last the power train computer (ECM). I would have a good pro shop check these out in this order. It is pretty simple.

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  • Medium-star Best Answer
    Russ May 22, 2009, 10:46
     Master

    There a quite a few things that can cause your engine to stall intermittently. One question to as is - Does the engine stall when you let your foot off the gas or coming to a stop? If this is the case then the cause could be a dirty throttle body or sticking idle air control valve. If the engine stalls on acceleration then some possibilities are are a faulty crank shaft position sensor or mass air flow sensor. If the engine will not restart right away that might indicate a faulty ignition module. The powertrain control module is also a possibility in any of the above cases. There can be a lot of trial and error in trying to isolate the cause of an intermittent stalling condition. Any stored fault codes in the powertrain control module may help.

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