Yesterday my dad drove my truck and it started acting up...It has no power, idles very rough and smokes alot more than usuall... I have tried a set of stock injectors that I am 100 % positive are good. I have also tried a new rail pressure sensor...whats next? I have a FP guage and have good fuel pressure.... I have removed my box thinkiing there may be a issue there.... Could this be a bad CP3? The local fair pull is tommarow and i was planning on pulling.... Please help me... I also checked all connectors to make sure they had good conncections

 

Did you pull any codes??

 

Maybe your FCA alot of problems reported when idling (rough) I think you can buy it from Cummins cheaper.