On tbi units they had aproblem of blowing the gasket under them, check for that as well as soft hoses goign to pcv and map sensor on firewall. If those are soft replace them spray chooke cleaner under the tbi to check for leak if rpm change then you've found the leak. If it continues to do that after these fixes, then check fuel pressure which shold be 9-11psi. Also if the question is not answered by an expert they could lead you ln the wrong direction. You can also clean iac with choke cleaner but do not remove it.
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Friday, November 16th, 2012 AT 2:19 PM