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Hey there Bordin, please remember that it is very easy to blame a carb for engine problems. Most people think that way, actually. But 9 out of 10 times the carb is suspect, it's actually something else.

You are on the right track. You have a wobbly vacuum gauge reading, which indicates a bad valve, and that is likely. The compression test will verify/deny the suspicion.

Once you have the mechanical aspect of the engine in good shape, THEN you can start blaming ignition and carb for your issues, but the engine must be sound first and foremost.

You're getting there!



I agree. With the oily plugs and the backfiring through the carb, it sounds like either a major intake leak or a bad valve/s. I would almost wonder if the owner knew about this when he sold it to you and just cleaned the plugs before he sold it to you.

Mudslinging aside, you are getting close to a diagnosis.

2016 Ram 1500 Crew Cab: 5.7, 65RFE, 4.56 gears with locker, Hemifever tuned, AFE intake, 87mm throttle body, JBA headers, 3" Flowmaster exhaust, split to dual 2.5" exits. 13.57 best ET so far.

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