95 dodge 4x4 cummins with 230 plate in it ,.
and big airfilter/
have owned this truck like 4 months and it seems to me that it has less power when its warm. is that all in my head or is there somthing to cause that,

 

Have you adjusted the valves yet? If they're too tight, you could be losing some compression as the engine warms up and the components expand. Worst case is a valve could kiss a piston, so it's best to check them. .010 I .020 E

g

 

about 10 thousand miles ago i should of put that in
just changed the fuel filter so that should be fine .
thanks
ken

 

If the shutdown solenoid is full of crud or the shaft rusted it can drop down a little once it gets hot.
Solution is easy, remove and clean, don't lose any parts, replace the boot if it's rotted out.
Also check that your throttle cable is in good shape and pulling all the way back to the stop when the pedal is floored.