Mechanics

GMC JIMMY ENGINE PROBLEM

2000 GMC Jimmy • 210,000 miles

I have a missfire I have been chasing even after engine rebuild.I have replaces all internal parts ( all new including cam ) I have installed the new conversion spyder injectors, new distributor, new crank sensor, new alt, new platinum plugs, wires, and coil. It has the org EGR valve and purge valve and map, I have replaced the maf with a known good used one. Someone told me its the engine computer? I also have a irratic tach witch goes haywire and is all over the place. Please help ! I put a lot of money into this jimmy and I still cant drive it. No check engine light either. I can do a money donation towars any help. Dont have much money left due to the problems but a true answer is worth money to me =)
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April 2, 2013.



Start with a compression test. What cylinder is miss firing?

Roy



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