I have noticed something about my truck and maybe you guys can shed light on it.

When the truck is cold I have great throttle response but when she gets to operating temps I can get a dead pedal feel. Give her throttle and she barely starts to climb, rpms go up but hardly no acceleration. Last year I added a Timbo apps, new injectors also. I have been getting P0251 code but I have already replaced two FCAs this year. The code is also intermittent with no CEL. Could my Rail Pressure Valve being going bad? I don't have a clue.

Thanks guys,
Dwight

 

Bump.

No one has any info?

 

Not the same generation but I had a 98 24V and it did the same thing when the MAP sensor went bad. If you find out post the answer so I can have a head start because I have an 03 now.

 

How's your truck running, Riddle? I'm have the same problems, just replaced the FCA but I'm not sure that is helping because I still have no power at highway speeds.