i have an 07 cummins with the 5.9L of coarse i got power hungry and stacked a dr. performance and the smarty (tnt) version and upgraded my clutch to a southbend dual disk and 90hp injectors and a silver bullet turbo and a fass 150 gph fuel system, 5inch straight pipe and afe induction system, but now it doesnt seem to have the power it had (my stock 06 will keep up with it) its been knockin all the time and white smokin when its cold.. nobody can tell me if its valves or injectors but ive sent my injectors off twice and got them checked and thats not the prob but i shoot the exhaust manifold with a temp gun and my number 1 cylinder is about 100 degrees cooler idk if i washed my cylinder out or just a burnt valve.. and i was gunna take it to a shop to fix it but idk any good performace shops south of houston tx..any ideas?? i kinda wanna just completely hop it up bc its just my drivin around truck any ideas on that??

 

Have you checked your valve lash? You might have burned one but sometimes you can readjust and get a little more time out of it before it is gone. Just a thought. Other wise I would guess you might wind up rebuilding the motor

 

Does not sound good we have done at least 15 comonrails this year most with piston or ring problems. Need to run a compression check.