I'm getting small random puffs of black smoke at WOT going up hills or other heavy loads. Very localized, like a single cylinder issue for a moment, not consistent at all. Injector or valve timing or ?!?!?! Injectors and pump rebuilt ~40k miles ago, aftermarket turbo running ~20+psi when this is happening. I've never adjusted the valves.
1HDT small black smoke puffs @ WOT (1 Viewer)
- Thread starter jellis
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- Thread starter
- #3
No no, that's really bad. Your EGTs are probably thru the roof!! You need to add more air via increased turbo pressure, or decrease fueling by tuning the fuel pump. At WOT I can't see my exhaust at all now that I've upgraded the turbo.
Some black smoke at WOT is pretty normal for a mechanical pump diesel and does not necessarily mean dangerous EGT's. If your exhaust is completely clean you are likely leaving some power on the table. That said - people (myself included) don't appreciate trucks spewing black smoke so there's a balance to be struck.
- Thread starter
- #5
@Douglas S do you ever have small random puffs of black smoke at WOT? What's going on? I first noticed it on a long road trip pulling a trailer earlier this summer and now it just does it randomly.......
I have noticed it occasionally. Not a series of puffs but a couple larger puffs of black if I'm WOT going from city speed up to highway speed. Haven't really thought too much about it to be honest - chalked it up to just being the nature of a mechanically fueled diesel and different loads the engine is being placed under.
- Thread starter
- #7
Thanks, that makes me feel a lot better!
