i have a 94 12 valave cummins with 90 hp injectors pump is turned up and tuned however my truck has been real sluggish lately and i really have to try to push the pedal through the floor to get any power out of it. just wondering if anyone had an idea what could be wrong???

 

check to make sure its not starving for fuel first. fuel line blockage and check your fuel filter.

 

i changed fuel filter still same problem whats best way to check lines i was going to just disconnect them and blow air compressor threw them is that ok or a bad idea??? and thanks for your comment

 

Boost leak maybe?

 

I just had the same problem the fuel shutdown solenoid wasn't holding open enough. I going to cable it just needs some fine tuning