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popping sound while idling

Went to get my car tuned, 5.7 based 392 with Eagle heads and new cam, and tuner would not complete the tune because he could hear a popping noise in the exhaust. I respect he didnt finish the tune because it may cause more harm than good.

The noise was very small and with my old ears I could not hear it. My 16 year old and the tuner could tho.

The noise almost sounds like a sucking noise, the engine does not shake or sound bad at all.

I am going to try and put a short video up so maybe someone knows where I would start looking at

He said he was pulling alot of fuel from one bank and very little from the other. his words - 15% from one side and 1% from the other


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