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 Ect

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Old 01-25-2013, 10:17 PM   eBay Motors  #1 (permalink)
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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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Old 01-25-2013, 10:20 PM   eBay Motors  #2 (permalink)
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test your balance rates
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Old 01-26-2013, 11:33 AM   eBay Motors  #3 (permalink)
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I would also get your return rates checked if its smoking and has a strong diesel odor from the exhaust?
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Old 01-26-2013, 11:40 AM   eBay Motors  #4 (permalink)
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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.
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Old 01-26-2013, 08:37 PM   eBay Motors  #5 (permalink)
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Sounds like a bad injector to me, balance rates would let ya know.
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