Question about 1996 Chevrolet C2500

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I have a 2000 silverado w/4.3l vortec engine. I took it to a mechanic cuz I was having difficulty pin pointing a good diagnosis my code reader gave me only a P0300 random missfire code. He looked at it hooked up his scan tool said that it had broken fuel spider on cylinders #4 n #5. I installed the new updated fuel spider put everything back together. ran the engine and #5 still has a random missfire issue. took it back to the mechanic that diagnosed the problem. worked w/him to figure it out. checked compression on #5 and compared to the rest checked about the same120psi. still no improvements made and out of money as well as time. please help!

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Try changing the spark plug on that cylinder,and then the cap and rotor and wires if needed.It is most likely the problem.If this was at all helpful,please rate,thank you.

Posted on Aug 24, 2010


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