Wondering if anyone has any ideas about this. 138000 miles, Just got another glowplug replaced, fuel filter is new, yet at idle when warmed up there is light white smoke puffing when stopped. it is not a heavy white smoke like a head gasket, and my coolant level hasn't moved. dealer says the injectors are good, whatever good means. wondering if a plugged egr system could cause this or, any other possible causes?

 

Could be injector related. My buddy is replacing his injectors in his duramax right now. He had white smoke at an idle, but not that much while driving. He hooked it up to scanner and 2 faulty injectors turned up

 

does the smoke smell like raw fuel or sweet like burning coolant

im guessing its injector related.

 

I think the fuel filter fixed it, i didnt drive enough after replacing the fuel filter to let the engine clear out. its been 2 days now and i havent noticed it smoking. I went about 30000 miles without replacing the fuel filter.

 

 

closing the thread then, if the problem come back you can re-open this thread or create a new one