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#2 no fire after engine swap

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Old 04-05-2014, 06:09 PM
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Default #2 no fire after engine swap

Long story short, swappedout my 402 supercharged to a stock 4.8. Took out programmed ecm and put stock back in. No fire at all on #2#8 cylinders. Brand new plugs and wires, swapped out all coil packs on that side and still no fire. Its so bad it can barely move. Any ideas??
Old 04-05-2014, 06:12 PM
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Track down those PCM pins and ensure the voltage is there? Checked coil pack harness wires?

Sorry to state the obvious, but it must be something simple...?
Old 04-05-2014, 06:28 PM
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Havent checked pcm but pulled each plug on coils to see which were not firing. Thats how i found out that those 2 cylinders are not firing. Thats when I changed out all the spark plugs and wires and started it again. Still the same. Than I grabbed a set of coil packs off of my 402 and switched out that whole side. Still the same.
Old 04-05-2014, 06:29 PM
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What about grounds? I know they are all hooked up. I dont know. Confused on tjisone.
Old 04-05-2014, 09:12 PM
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Think I got it narrowed down to injectors. Must have plugged or bad injectors. Bought a spark plug coil tester and I had good spark. Pulled the injector wires while it was running and thats what it was.
Old 04-06-2014, 11:27 AM
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My next suggestion was going to be to use a infrared temp gun on the primaries... But apparently you already figured that out about the injectors.

Glad you got it narrowed down



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