Question about 1993 Buick LeSabre

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It runs fine but a/t transmission shifts up quickly and it won't kick down for power.

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  • rdamichael Jun 21, 2009

    New fuel filter was installed 3 weeks ago. This car sat for over a year before i bought it and was hooked up to a dead battery. I got rid of the miss it had with new coil packs. It has new wires, plugs,air filter, new fuel. one additional thing it does is that it sometimes after you start it it races the idle up to 2500 rpm and won't go back down until you turn the car off and restart it.

  • rdamichael Jun 25, 2009

    it was the tps. thanks for your help.

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  • Buick Master
  • 2,007 Answers

Change fuel filter.

Posted on Jun 21, 2009

  • Dar
    Dar Jun 21, 2009

    Check to see if the throttle linkage is sticking. If not, it might be the idle control system/ sensor, and you better check the timing. Just get a timing light and shoot it at the mark on the crank. If the mark is jumping around, the timing belt has jumped a cog. It should stay basically in one position. Check for broken , loose or cracked vacuum lines, loose intake bolts, and then change that crappy vote you gave me. :(

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