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99 5.3 Silverado


MKWA

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Posted

Well my problem is back with my 0302 code. So I changed intake gaskets, fuel injectors, plugs, wires, coils. None of that worked, So I checked compression and on the #2 cylinder it read 60 psi. I took off the rocker and nothing appears bad so I check compression with cover off and it reads 125 psi? Now I am stumped so I put it back together and check compression again, start truck cylinder 2 reads 60 psi. I disconnect coils on all cylinders and check pressure 125 again. I put it back together and check all cylinders and get 125 +or- 5 on all but #2 with coils hooked up. Help me please.

Posted

Put a Vac gauge on it and make sure there isnt a valve sticking causing the comp to drop intermittently.How many miles on it.How many strokes to get to 125.Iwill third the motion of never hearing of a running comp check is that where the 125 came from???

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