Is there a smoke screw on 07 5.9

 

no.

 

Bought truck used have put new comp new injectors still smoked when u mash on it and get 10 mpg what else could have been done to it to kill the mpg

 

yep sure is the screw is on the back of the turbo. under the wastegate. jk jk im bn a smartass. no theres no smoke screw. check ur turbo for shaft play and u may want to check for boost leaks. how much boost are u pulling?