What do idle speeds have to do with passing a smog check? My repair place said it wouldn't pass unless the idle speed was lowered.
40

Asked by Bill Feb 16, 2015 at 11:18 PM about the 1992 Toyota Hilux

Question type: Maintenance & Repair

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5 Answers
40

Bill answered 9 years ago

Shouldn't the tech be able to set the idle at a lower speed to do a smog test?

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40

Bill answered 9 years ago

My car hasn't failed a smog since I bought it 24 years ago. Have the requirements for idle speeds changed? And it passed somewhere else, no repairs were recommended.

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40

Bill answered 9 years ago

EMC? What is that? Two mechanics said the emission control devices were working okay.

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40

Bill answered 9 years ago

No one found any cracked vacuum hose. The decel valve might have been corrected to lower the idle speed.

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