12.7 Detroit backfires and throws fireballs
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Flipp, Apr 11, 2020.
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Last edited by a moderator: Oct 14, 2023
Reason for edit: Fixed quoteDetroitDudeBro Thanks this. -
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She’s got a Detroit 12.7 60 series. 6067BK60.
Long story short she’s been misfiring when putting in gears. Not all the time. When she starts acting up I give it throttle and it blows white smoke and clears up and starts running fine. Once again it’s not all the time. Very inconsistent to say the least. I have changed
Injectors
Ran overhead
Injector wiring harness
Turbo boost sensor
Oil pressure sensor
Manifold temp sensor
fuel filters
Air filters
Ecm.
Turbo (new)
Fuel pressure checked ✅
Bull gear was checked and had no play
Any help would be appreciated thanks. Will be doing a custom fine tuning to see if it helps. Seeing if anyone else has had any luck with this problem. -
Having the exact same issues got 12.7 99 DDEC IV it was smoking like a freight train when got her white smoke changed all the 6 injectors, all 30 rocker screws didn't stop smoking but at the same time it was making like gunshot sounds around 1500-1700 rpm's so than simply decided to do a complete out of frame and fired her back up this morning no white or black smoke but oil pressure is at 20 psi at idle and goes as much as 50-55 psi around 1800 rpm is that normal temperature for 60 series? (Haven't pulled any load with it yet)
It fires up fine (not black or white smoke) but it still leaves a large white smoky cloud at 1500 - 1700 rpm for a second or so and it doesn't throw any codes on ECM ? Changed everything from head to oil pump didn't change relif valve though each sensors was replaced but I am not sure if it has nox file on ECM or not
What y'all find out the problem was? (
it sounds so similar like we all are having the same issue) -
Oil pressure normal. Once mines warm it tops out under 50. White smoke, backfire on mine was from aerated fuel. Lines leaking at re usable fittings. I should have used the new style plastic lines. They seem durable and aren’t expensive either.
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Rideandrepair Thanks this.
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Last edited: May 4, 2024
DetroitDudeBro Thanks this. -
where should the boi run mines between 10 12
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