stumped... white smoke - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 5 (permalink) Old 01-25-2013, 09:17 PM Thread Starter
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stumped... white smoke

okay im stumped i have a 2003 Federal LB7 its straight piped and at idle i have the white smoke blowing out i know this is an injector issue them going bad but this is the only simptom that my truck has? It only has 57,000 miles i know im beating a dead horse but i have been reading for months and just dont know

I mean i dont know if this means anything but it did sit at my uncles house for about 4 years with out being started

And one last thing its a LSSV not sure if that has any meaning but does the military run a diffrent blend of diesel on base?

Any help will be great thanks Tanner
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post #2 of 5 (permalink) Old 01-25-2013, 09:20 PM
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test your balance rates

2015 stock for now LTZ

Sold: 05 lly cc, afe turbo inlet, blocker plate, efi dsp5 by duramax tuner, all on mod with HIDs high and low
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post #3 of 5 (permalink) Old 01-26-2013, 10:33 AM
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I would also get your return rates checked if its smoking and has a strong diesel odor from the exhaust?

Looking for LB7 Injectors?
Check these prices out!....

......... Lincoln Diesel Specialties .........
Phone: 920-361-7700

Click here For,
LB7 Injector Install Instructions
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post #4 of 5 (permalink) Old 01-26-2013, 10:40 AM
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It very well could be your injectors. You could have an injector sticking open on the exhaust stroke and it doesnt burn, this causes white/blue smoke. But while driving the heat burns the fuel and that little leak isn't noticable. Try to free it up with additive like Power Service. I used the whole 250ml. bottle in a tank a couple times, then ran the reccomended amount from then on. It might free up that injector.

It's worth a try... But if you do need injectors definately give Brent a call! LDS has great prices and Bosch remans.

Need LB7 Injectors? Check these prices out!

Lincoln Diesel Specialties
"Quality Parts and Service at an Unbeatable Price"

Or call us... 920-361-7700

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@180,000-New injectors from Lincoln Diesel, CAT Adapter/filter/spacer

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post #5 of 5 (permalink) Old 01-26-2013, 07:37 PM
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Sounds like a bad injector to me, balance rates would let ya know.
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