One of the guys i work with has a 2001 cummins that has an aftermarket intake and muffler deleted,he has noticed it smoking between shifts and when he gets on it,Any ideas,thanks in advance!!!!

 

It's the hot weather

 

Hey!
I posted this same question earlier and got no response.
I puff a stream of black smoke while low in the rpm band right after a shift.
I thought that it might be fromthe new ULSD, and the fact that I have been adding "homebrew" additive - made from 1 gallon of TCWIII two stroke oil mixed with 1 quart of Power Service Deezil Kleen.
It never did it beofer - that I noticed.
Economy is about the same, and I haven't noticed any reduction in performance.
Dry Creek

 

THANKS to both replies,ive got an 02 with an automatic in it,i have not really noticed mine putting out alot of black smoke when i get on it,im also running soy biodiesel in mine,the guy i work with has a 6 speed and i think is running regular diesel.thanks again!!!!

 

Mine puffs a little unintentional smoke on take-off too. Not much oxygen in the air here either in the afternoon but lots of humidity/water.

 

I get a puff between shifts that seems to be more noticeable to me as well.... oh well... At least the cars behind me know I'm shifting