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Re: 6.5L Diesel shooting out black smoke
don't have alot of experience with the 6.5's, but i know they are notorious for pump problems. this is not the best news for anyone, but i hope others can help more with the diagnostics. you could always take it to a shop/chevy dealer and pay them the diag fee, and go from there. Either way, the black smoke is a sure sign of "over fueling"....either the pump is pushing too much, or the injectors are leaking...or regulator(i think it is internal on the pump) is blown.
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Disclaimer: I am not perfect, i may be wrong in my advice from time to time. Also note that any advice given is as is with no warranty whatsoever, and i have zero liability if you get hurt for not being safe while working on your vehicle.
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