mudpie
I'm Awesome
I've got a '96 C2500, 5.7, and it's misfiring. CEL is flashing, but the code is "Random Misfire". I pulled the plugs and #3 and #5 are fouled black. The rest look good. Gap is good. Did a compression test on that bank and I get 200, 195, 190, 195, so I'm ruling out head gasket. Plus, I'm not losing coolant. Cap and rotor are brand new, and I've verified the firing order probably 10 times. Plug wires are a couple years old, but I've moved them around and the problem stays with 3 and 5. A couple years ago I replaced the injectors with a used spider injection assembly off a running motor and I've had no issues. Fuel pressure regulator was replaced with new at the time, as well as the manifold gasket.
I'm going to tear into it today. What should I be looking for? I'm thinking the spider is leaking maybe? Any suggestions appreciated.
I'm going to tear into it today. What should I be looking for? I'm thinking the spider is leaking maybe? Any suggestions appreciated.
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