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97 silverado 5.7 won't idle
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Question
97conversion
Problem: I have 97 Silverado 5.7 that won't idle.
Heres the story: I bought this in march 2015. It had a slight miss at idle but runs fine otherwise. 155K miles. The check engine light would stay on constantly with a p0300 and p0305 code. Took me a while to figure out I have 110 psi in the number 5 cylinder so looks like I need a valve job.
I've been running the truck as is until I get around to pulling the heads. The other day I was driving the truck and it died at idle. Ever since then it will not idle. I can start it and give it gas to keep it running. It revs up fine but just will not idle once I take my foot off the gas.
It looks like the previous owner had replaced a lot of stuff trying to figure out the original valve problem. It has new wires, plugs, cap, rotor. Fuel spider has been replaced. Looks like the idle control module may have been replaced.
I suspect my fuel pressure is fine as it runs fine if you give it gas. Maybe EGR??? No vacuum leak that I can tell but its hard to figure that out now that it won't idle. But the big question is should I be trying to diagnose this problem knowing I have a burnt valve issue? Should I just get the valve job done then figure this out? I'd really like to have it running so after I do the valves I know it will fire right up with no problems
THanks
1997 Z71 Silverado K1500
Centurion Conversion Crew Cab
5.7l V8
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