Originally Posted by MxRace75 I see IAC-Desired C/L Idle Speed table but that is only for in Drive. What controls the Desired C/L Park/Neutral Idle Speed.?? .. Pot luck! There's no real setting, it's aaround there.... it's really a poor idle specific RPM ECM...
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42! 1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner! -= =-
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