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Duramax First Generation: 2001-2004 (LB7) Discuss the first generation (2001-2004 LB7) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.


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Old Today, 02:23 AM   #1 (permalink)
Skyler23
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Join Date: Jan 2020
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03 LB7 smoking..

So I bought this pickup a few weeks ago and it was smoking white/blue bad. Turned out it had a bad injector, so I get a new set put in and get the pickup back and it will still do it. Let's say its operating temp and I leave a light, it will smoke through the intersection then clear out once u get on it. Smokes like a pig at idle as well. No idea what to do. Only have +50hp injectors and a 4in cali compliant exhaust system still has the cat. Running on road diesel with anti jell additive.

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Old Today, 08:36 AM   #2 (permalink)
Rvn4me
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Black smoke you might be able to tune it out by cutting pulse width a tad at idle.
White smoke you likely have a tip leaking/not sealing.
Just curious why you need anti jell additive living in So Cal.


Last edited by Rvn4me; Today at 08:38 AM.
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