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Re: '90 K3500 7.4 High Idle?
Posted to Technical Discussion Forum on 3/31/2004 2 Replies

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Hi Mike, Thank you for the idea, but no sign of external or internal vac leaks & PCV OK. Minimum air rate has been set to 550 RPM and IAC counts are 20-30, but ECM is controlling at high idle. Even re... Login to read more.

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