Chevrolet Q&A

Ask Your Question

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

 

Question

Visitor, 5.7L V8, Stratford, CT, December 18, 2010, 08:46

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

1 Answer
Flag This
  • Answer #1

    December 19, 2010, 01:23
    Profile_thumbnail
     Master

    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...

    Reply
    Flag This