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Question
2 tone pheonix
Misfire when all is showing to be GTG( good to go). I'm working on diagnosing a misfire on a 04 snow cone ( avalanche) did compression test, numbers are C1-170, C2-170, C3-160, C4-170, 5-160, 6-170, 7-150, 8-170. Cylinders 5+4 are showing clean number 7 is fouled. Don't have a multi meter so unknown currently whether the wires are within specs( suspect that is the issue at this point,) bad wires don't explain one or the other of the 3 plugs. Injector's are showing flow, as for proper flow, not sure. Also note that there is a weird scraping sound coming from the intake. Coils on those cylinders are good. Did the swap around test, no chasers found. Am getting voltage at coils and injector's. Reception of signal line I will check tomorrow. Its mid night here at the western gate to hell. An ohm test and signal check are the last 2 things I know to check, any other tidbits you can throw my way? And what the heck is the noise in the intake? Not wanting to yank Mani if possible. As for the wires, will be letting customer know he needs a set any how( found 2 old wires under there) p.s. no CEL. MY personal hunch is a set of wires and a big ole bottle of injector cleaner.
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