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Originally Posted by maxwedge
The pcm presets determine the idle speed, both 900 and 1000 are high, based on my scanner readings, my 98 LTZ 3.8 idles at about 750.
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Warm or Cold start?
But the 1000 rpm Lumina runs since 3 years ago fine, the gas milage is good and the rest is fine, is the tachometer not correct?