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Originally Posted by bike01
My '91 zr-1 will idle 1500 - 2000 rpm right from start up in the mornings and stay there until the car warms up. After it reaches operating temperature, the idle will drop down to about normal. Any ideas. Doesn't happen al of the time.
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I had a High Idle that turned out to be a Vaccum leak under the plenum, however my high idle never settle down to normal RPM's, it might be the ECM Chip do you have any after market chip?