93 2500 HD problems
 

Cranks fine. runs good. after warm up, it won't accelerate over 2200 rpms. just boggs, backfires, almost dies. will crank right back up, but has no power to move forward.
changed TPS, MAP, Coil, cleaned EGR(and tested vacuum), cleaned idle air control valve, tested fuel pressure( pressure remained during bogg). rebuilt fuel pressure regulator.