I have a 2004 GMC LB7 with 259,000 miles. When I start it up an let it idle it's a faint white smoke coming from the exhaust. If I go drive it goes away and when I idle for a bit it comes back. Good black smoke when accelerating and smooth idle. Is this a injector sign or just may need a fuel additive? Not sure
Smoking
- Thread starter Cww
- Start date
They take quite awhile and the injectors are fairly price figure to spend over 2,000$ in parts. You should log balance rates to see how bad the injectors actually are. EFI Live can do this as can the dealer
Yeah my lb7 had 0 smoke when I had it stock with fresh injectors. It seems like yours are starting to haze a bit
It depends on mileage honestly... If these have 125,000 miles on them then I doubt there is much you can do. Search this board as there is something that can be bought from the dealer that can clean out the injectors and there is a special procedure that goes with it. It will only buy you a short amount of time.
You may want to pay special attention to the return rates, I think the white smoke has something to do with the return, the injectors are not atomizing the fuel so they wind up returning it, or something along those lines
Here's a link to "one" of the injector cleaning threads on this forum that paint was referring to, there are a few more, and one that has step by step with pics, but this should get you goin
http://www.duramaxdiesels.com/forum/showthread.php?t=36198&page=3
Here's a link to "one" of the injector cleaning threads on this forum that paint was referring to, there are a few more, and one that has step by step with pics, but this should get you goin
http://www.duramaxdiesels.com/forum/showthread.php?t=36198&page=3