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International Automotive Technicians Network
Re: GM 5.7 ltr High Idle Speed
Posted to Technical Discussion Forum on 5/25/1999

cecil:

you need to look at iac counts it should be under 20 if tbi is good and [...] it is 0 there is a vacum [...] usaly either leak at throttle body base. but if it is a rebiuld it could be internal intake [...] the heads were shaved sometimes intake will ... Login to read more.