Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Welcome to JustAnswer, my name is XXXXX XXXXX I'm here to help get your problem resolved. Ask follow up questions, thanks.
It souns like you have a intake gasket problem. When the engine is cold and missing, run water over the intake manifold and check for an RPM change. If a change is noted, replace the intake manifold gaskets and check the manifold for warpage. Let me know if you have questions, thanks.
I get a 0300 code mis fire. I was going to run BG fule injector cleaner. Should I try the manifold test first?
I just recently purchased a 2004 Tahoe with 155000 miles