Am I having PCM issues?
Cargo Master
Joined: Dec 2021
Posts: 2,394
Likes: 1,001
From: Chambersburg, PA
It was an electrical issue. I ran the truck and messed with the wiring around the FICM and it was changing the way it idled. I put the old wiring harness back in and all the problems I was having went away. Now it smokes black, like it was before I touched it. Is there a way to know if the truck is tuned? Also, if I put a tune on it, will it double tune, or overwrite any prior tune? Thanks.
so aside from the smoke it’s smooth again? Was the turbo cleaned as a part of all this work?
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Cross-Country
Joined: Apr 2022
Posts: 79
Likes: 8
Yes, just smoke. In the "stock" tune it smokes a bit, and with the SCT X4 "street" tune it smokes too. Sometimes more sometimes less. The turbo makes about 20psi under load, and I rebuilt it a couple months ago, and replaced the VGT valve. It sounds and runs good aside from the smoke as far as I can tell.
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Jeremy2792
6.0L Power Stroke Diesel
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