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Username Post: What would cause an INCREASE in RPM while sitting at a light, in gear?
Valued Contributor
Posts: 3769

Reg: 04-15-05
08-18-18 08:23 AM - Post#2743498    
    In response to IgnitionMan

Yes, have seen it happen, even does so on EFI engines when the mixture is right on out of gear and engine is at ops temps, and an idling load is applied. Doesn't take much. A very small vacuum leak can have little to no effect at idle out of gear, but cause idle to rise to overcome loading of the engine.

Stop questioning me as if I have no brains, I am not stupid, and have worked in these fields for over 45 years, some of them at GM, and Holley.
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