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Re: 6.4L Part Time Runs Bad
Posted to HD/Fleet Forum on 7/23/2020 3 Replies

check the engine harness routing...try tugging or adjusting the engine harness to see if it helps....maybe there is a control wire being grounded somewhere. code says min-max frp difference longer than .4sec will set this code. I would try the KOER self test w... Login to read more.

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