LBZ: LBZ Blowing blue on cold start up?

[Summit151]

Hey guys I have a 2006 LBZ and every morning when I start it it blows a little blue haze until it warms up and then doesn't blow it all any more.There is minimal engine blow by. I also use diesel fuel additive every tank. Would that cause I blue smoke on start up? The truck also has 260 000 km on it. The injector balance weights are also good. I am running 5 w 40 full synthetic right now. Any ideas ?


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[Chevy1925]

does it smell like diesel or oil?

 

[Summit151]

Mostly diesel to me


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[Chevy1925]

100% stock tuning? what kind of exhaust? stock cat still? fill out your signature please so we know what you have all done to it

 

[Summit151]

100% stock tuning? what kind of exhaust? stock cat still? fill out your signature please so we know what you have all done to it

Sorry it's has EFI live tuning and a 5 inch MBRP with just the muffler in


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[Chevy1925]

put the stock tune back in and see if it still does it

 

[Summit151]

Ok I will try that. How come a time would make it smoke blue? My understanding is blue is always oil


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[WVRigrat05]

Blue is cold diesel, usually lower idle rail pressure will let it blow blue smoke on start up.

 

[NC-smokinlmm]

Normal, it's a "tuned" diesel. Lol...

My LMM would haze blue also when cold.

 

[Wikid]

Same, before I installed twins my motor puff a little blue smoke on startup. Also tuned

 

[ty_LBZ]

They call diesel engine oil burners for a reason