my 12v has been smoking white and i dont know what it is. when ever i start it, it smokes black, but when i rev it, it smokes white. also when i start it it will have a weak start and other times it with have a strong start. the truck is stock except for a cold air intake and the fuel pin has been turned. do you guys know what the problem might be?

 

White smoke is usually unburned fuel. You may have a bad injector that is leaking off that also would explain the weak startup. How does it run otherwise has the fuel milage or power fell off badly? Rocky

 

on a very cold start without grids working, why does my truck smoke pure blue??
has no blow by at all either

 

ive lost 6mpg and i have noticed a good size power loss

 

I gonna bet you have at least 1 injector bad. In my part of the world pump shops will test them for free. If one is really hoseing bad it can wash that cylinder down and lead to bigger problems, better check it out pretty quick.Rocky

 

as soon as i get the money for new injectors ill get them all done. and put bigger injectors in. im only a week away from getting them

 

Maybe burnin oil or a bad injector!!!