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Hi everyone, I have an LBZ Duramax with 167k that's deleted and has efi live tuning and has been smoking at cold start up very badly and seems to get worse and worse the colder it gets. From 60 degrees too 35 degrees it smokes badly and will have very high balance rate on cylinder 4. I have checked compression and have 370+ psi on all cylinders as well as run cuttout tests and upped rail pressure at idle. Wondering if it's a tuning issue or injector issue? Have swapped injector 4 around the problem does not follow. I will try to post a video of my issues, thanks
 

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118 Posts
white smoke ??
glow plugs ??
 
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