BC 400 cold starting issuse

Anything mechanical is gonna smoke pretty good when it's really cold. As long as it clears up once it comes up to temp your all good. I resonate with comment about the fire department Lol. I haze the yard out every morning when it's cold

Even more if she's a bit worn or a lower compression build

 

@Brettj3876 is exactly correct.

You don't know the situation with that truck. For all you know someone may have turned up the fuel and slowed the timing down. It is extremely common for the 400 to smoke and smoke when they are cold. I have seen them smoke to where I can believe someone might call the fire department. That is not out of the ordinary.

The big cam engines are like two completely separate things from when they are cold to when they are warm. Although the 350 is much much much better in that regard. I get almost no smoke when it's cold with my 350.

Here are the questions that you really need to answer.

1) Does your truck burn oil?
2) Do you have a miss?
3) Does it smoke after the truck is warmed up?
4) Does the truck have power?

If everything is fine after it's warmed up, forget about it.

If you're not burning oil and everything else is good and you absolutely can't stand it, set your timing at 65 and that will slow the smoke down.

And have a pump shop go over your pump and set it to the original specs and put new injectors in and do the overhead.

 

Have the overhead done.

If you send everything to premco, Warren can take care of it. If you're going to do that replace the injectors also.

Then make sure the overhead is set right.

And if you really want less smoke set the tming at 65.