Most QC's feel that wayMine has been slow for a long time now.
Replaced plugs and wires and installed demon coils... no change
Cleaned out intake manifold...no change
Cleaned injectors... no change
Built a true CAI....no change
Bought a JTSVP TB.... no change, except have a surging idle now (still)
Bought new TPS and IAC.... no change...
Installed B&B long tube headers... with high flow cats.... a little improvement.
I don't know what else it could be other then maybe the engine is just tired.
My truck feels like its 50-75hp low.