I'm new to diesels so was wondering when kids around here would take off in their diesels they'd leave a trail of black smoke, what causes that?

 

They had a chip or tuner that wasn't very good.

 

Black smoke from a older diesel is caused by too much throttle against too much load. The injectors are putting in more fuel than the engine can use, and it goes out the exhaust as black smoke. Non-turbo or non-supercharged engines do this more.

A newer or new oil burner will smoke if the owner changes the engine programming via a chip or retune.

 

Ok I want to put a 4” exhaust system on my truck and didn't want to if it was gonna release black smoke

 

You're okay.. Exhaust doesn't cause black smoke by itself.

 

Being able to blow black smoke is one of the best things about having a diesel! that and they pull stuff like nothing else

 

Somebody shoot me.

 

Haha I am with you cleatus. I hate the fact that my truck use to bellow out black smoke all the time. Finally have it running good, no more black smoke unless im under heavy throttle in a hot tune. I don't see the point of blowing black smoke 24/7....you get bad mpg, and it gives our trucks a bad name. People hear diesel and they just think of black smoke.

I want a clean burning truck with good mpg! Keeps me under the radar!

 

Man, last year we were on the black out the tree huggers and the coal rolling thing and now we're responsable light pedal heads this year, what a year can change. Not bashing, just an observation. Anyways, I drive my truck responsable and if I need to get out of a tough jam and hit it, its beltching something with no regret.. carry on gents.....