Question about 1992 Chevrolet Suburban

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1992 suburban not passin emission testing

Hi i have a 1992 suburban and i had the emission testing done and it failed. they said all the tests passed except for the curb idle. can you please tell me what it could be and what i can do to make it pass the test?

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Could be the ECM that controls the fuel supply and mixture to the throttle body .

Posted on Apr 03, 2009

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