White/blue smoke

[Ronin114]

I'm pretty sure this topic has been beaten to death but I can't seem to find an exact answer for my specific situation. When cold starting in 30-40 degree weather, a puff of blue tinted smoke will come out (1-2 seconds) followed by very very light white smoke for 1-2 minutes. The startup itself is not rough and it idles really smooth... Turbo seal, injectors, o rings, or FICM? I don't have a clue and any insight would be appreciated.

[jaggermouth]

I'm having a similar issue. I replaced the FICM due to low voltage and it didn't really help.
I'm leaning towards turbo or injectors since if I take the tune off my truck, it has a light haze of blue while driving at low boost, but then clears when wide open throttle is applied. No smoke while driving with a tune, just cold start.

If you find a solution please update your thread to help others!

[Ronin114]

Yea, the truck is stock except for a 4" turbo back exhaust system... It isn't smoking at all under acceleration and after warmed up.

[strokethis1121]

well i have a 04 6.0 and i had the ficm unit replaced because of a no start and number 1 and 2 injectors replaced plus, my fuel pressure reg changed cause of low pressure and no extras bone stock. and cold weather starts blows a little white cloud out for a second then goes away, but my ride will idle rough for about 20 seconds and then smooths out, i asked a few friends that have stock ones and they say its been doing that since they bought it new around 2004 and up. and they got over 100000, i only got 98000. not sure but havnt gave me any problems

[cormc]

I'm having same problem but mine smokes heavily till it warms up then no smoke. The colder it is the worse it smokes. Just had ficm rebuilt. Turbo egr cooler oil cooler replaced about 50-60k ago

[jaggermouth]

Check for codes, probably injector issue. What oil are you using?
I just switched to 5w40 rotella synthetic, after a 100kms I am noticing cold starts were getting better. I just added RevX so I will drive it and see if I notice an improvement. If not, I will replace number 4 injector.

[cormc]

It was doing it before I had the ficm replaced after I replaced the ficm I had one injector code but added hot shots secret to my oil and haven't had any codes since. I run rotella t6. I used to use rev x but tried the hot shots secret this time. It runs a kittle rough when I run it wide open I am thinking maybe an injector o ring or something along those lines

[04cr450]

From what you are describing the smoke after a cold startup is normal... Mine since day one starts up with a light blue haze then a very very light white smoke for about 10 mins until i take off... My ficm and injectors are great. Diesels hate to be cold and when that diesel fuel is cold it caused the engine to smoke liek that.... Post a video to get a better idea.. I will try and post a video of mine this weekend- my truck by the way has been sitting all week.

[jaggermouth]

Maybe I'm wrong for doing this, but I compare my diesel to my dads cummins of the same year. His can sit for weeks and then start with one small puff of smoke and then nothing. I am almost embarrassed to start it when people are around haha. My buddies 6.4 can sit in -30 overnight and not really smoke either.
I'll get a video of mine tomorrow morning

[cormc]

When I start it up tomorrow morning I will.