My truck started smoking all the time, it is black smoke, not sure what would make it smoke black all the time, even at an idle u can see it, and under slight acceleration. i tried taking off the chip and no change at all, i have a 4in exhaust, AEM Brute Force HD Diesel Intake and Diablo Sport Predator Programmer , any help would be great, thanks

 

try clean your air filter...

 

stuck open injector or leaking injector. some way or another your getting to much fuel or more fuel in then before or like mentioned above your air flow is to restriced

 

also maybe try and run some seafoam and fuel system cleaner that might help

 

check your MAF sensor... it could be dirty/oily and it could be giving the ECM weird readings

 

Air cleaner is clean, ill try cleaning the maf sensor and see if that will help.
also my fuel mileage went from 18 to 12mpg

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Is there a way that i can check my injectors, to see if one is stuck open? also what should i use to clean the maf sensor?

 

maf I would try brake kleen

 

They do make MAF cleaner... They should sell it at any parts store

 

get an auto enginuity and do a injector test to test them, and maybe a maf reading

 

not so good of an idea, brake kleen can melt or damage the MAF, better to use MAF cleaner