Question about 1990 Buick LeSabre

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1990 Buick lasabre - stalling on idle...at lights..anytime I slow

Every time i come to a stop or slow down for a light the car stalls. I just changed the spark plugs which took care of one problem now I have this problem. Any solutions?

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I had the same problem it was my MAF sensor.

Posted on Dec 05, 2008

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Its possible that your vehicles fuel pump could be going out on this car sorry take it to a car dealer ship and it may cost you alot
scincerly: Brian

Posted on Nov 18, 2008

  • Bo Davis Oct 30, 2013

    check purge valve next to your firewall its rectangular box mine had a filter inside they get carbon build up or the little metal piece blocks air flow, hope that helps..

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Continous surging and stalling


Per your description, I would suspect a fuel pump issue. When the fuel pump is running the pump impeller heats up. On an older pump the impeller can begin to seize up and momentarily stops and starts. Some times it just stops and has to cool down for a couple of minutes, then is ok for a while.
To test this theory, when the engine stalls and stops, your mechanic can use a rubber mallet and hit the bottom of the gas tank, this will free the pump impeller and the car will start again.
Or, have him install a fuel pressure gauge and go for a drive. If the pressure begins to fluctuate and drop, you know the pump is causing the issue.
Good luck, let me know.
Regards,

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