LOTS of smoke!

[Colorado6.5]

Hello all!
I have a 94 6.5 TD I've put about 7000.00 into this truck(2500).
This is my question; When I start it in the morning after being plugged in all night, it will start right up with a little bit of burbling. But the smoke just pours out of it. It is a blue color, just like a gas motor with bad valve seals. It does have some white smoke also but not a whole lot. After the motor is good and warmed up, the smoke completly stops.
I need to do some towing with it but now I'm kind of afraid to.
The truck has 163000 miles on it but I was told the motor was rebuilt shortly before I got it.
Any help you can give me would be great.

[rhsub]

Does it really rattle on cold start. PCM advances timming to stop smoke which causes it to rattle, may be cts (coolant temp sensor) not giving proper reading
Ron

[Robyn]

Several things come to mind here but first off I would have a look at the injectors.

A set of injectors that are badly used up will cause exactly what you describe.

Aere you getting any DTC's (SES light coming on)

Yank the injectors and replace with a fresh set or have yours tested.
If they have over 100K on them I would opt for a fresh set.

Cold starts with a set of injectors that are very low in POP pressure and have a poor spray pattern will cause lots of smoke on startup.

Poor injectors can cause other issues as well, such as poor power and a loss of MPG.

Best

Robyn