Question about 1999 Buick Park Avenue

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I have a 99 buick park ave 3.8, got in the car drove to get dinner went in eat, cam out tryed to start would not, after 2hours it started drove to the house it staled, as long as it is cold it will run when it get to normal operating temp. it will stall and not run, replaced the fule pump still dose the same thing,

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Either the crank position sensor or something else but you will need to do some tests and post the results so myself or another mechanic can give you the diagnosis ,like when it stops is it still sparking?? are the plugs wet when it stops ?? is their fuel pressure when it stops ,is it throwing out black smoke ??

Posted on May 28, 2010

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  • ghostriderjo May 28, 2010

    Yes it still sparks ,the plugs are normal, yes it has fuel pressre when it stops , yes it is puting out black smoke, and it is hot it even cout grass on fire it back fires and shakes really bad t 3000 rpms when t finly starts and then it dies again let it set until it s cold it will run like new until it gets warm

  • Colin Stickland
    Colin Stickland May 29, 2010

    right the auto choke is staying on which means its running rich ,now i can tell you wahts wrong and i think you will need a new sensor on or around the cylinder head area but i cannot tell you where it is in all honesty because i am in spain and i have never seen one of these cars except on the TV .hence it starts when cold but once engine warms up it willl will splutter and then choke itself up .Quick fix is to buy the sensor then with it in your hand look for that component on the engine and then change it .

  • ghostriderjo May 29, 2010

    it just dies no splutter, this car is fuel injection, no choke.
    But I think you are right about the crankshaft position sensor, I will let you know I’m going to get one tomorrow

  • Colin Stickland
    Colin Stickland May 31, 2010

    it might not have a manual choke that you can see but it does have a autochoke thats controlled by the ECU


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