Question about 1999 Buick LeSabre

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My 99 buick LeSabre turns over and kills away unless i hold my foot on the gas. what is wrong

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  • Clint Smock
    Clint Smock May 11, 2010

    Is your check engine light on?



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The Automatic Choke is not working correctly. If you are flooring the pedal, and I am assuming that you are running a Computer operated ignition system. So, then by opening the throtle, you are just letting more air into the motor, and leaning out your gas to air ratio, which is controlled by your computer. If it idles Ok as soon as you get it started, then I would say that this Choke issue is based on a faulty (MAF) sensor, and since the fuel going into your engine is controlled by your computer and the interaction it has between the throttle position sensor, and the Mass Air Flow (MAF) sensor, to regulate how much gas to inject into the throttle body at any particular moment.

If this is a carberator engine, then the choke issue is easy to fix. On the side of the throttle body (passenger side) is a round bowl looking thing with a plastic cover, held into place by a couple of tabs and two or three screws. If you look close enough on the plastic cover you will see teo arrows poiting in opposite directions, one saying leaner and the other saying richer. Loosen these screws just enough to be able to turn the plastic disc cover towards leaner, about a quarter turn to half turn, and tighten up the screws again. This should work...

Posted on Apr 24, 2010


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