Question about 1997 Buick LeSabre

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Erratic idle speed

Car "hunts" for proper speed at idle. sometimes will die when slowing to
a stop, when it does this, it will pick up engine speed suddenly.
i have installed a new iac motor, had the computer flashed, new tps.

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  • wenco Oct 17, 2008

    turned out to be the pressure regulator. thanks

  • Anonymous Mar 30, 2014

    after new cts still idles up too high idles little rough

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  • 6 Answers

Have the fuel pressure checked. Could be an erratic pump or pressure regulator.

Poppascott

Posted on Oct 12, 2008

  • poppascotty2 Oct 17, 2008

    Had the same problem with a 92 Limited. Same engine and electronics except for the Gen I engine, and didn't have the OBD II computer. Parts are esentially the same though.



    poppascotty2

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