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1998 Chevrolet 2500 Pickup Question: idle won't level out change parts still 1800rpms in park and drive gear



Visitor, 5.7L V8, Stratford, CT, December 18, 2010, 11:46

I changed the Maf, Map, Tbs, Iac, and idle starts out correct then rises from 900 to 1800 rpms. How can i fix it?

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  • Answer #1

    December 19, 2010, 04:23

    I would be looking for a vacuum leak or air intake leak, providing more air than expected to the intake. You could have intake manifold gaskets leaking...

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