I have a 1995 chevy K2500 with a 5.7l/350 tbi. I just rebuilt the motor new pistons, rods, crank, bearings, cam, heads, oil pump, all new seals, headers and a tbi spacer new temp sensors and thermostat, and IAC, the truck idels fine and revs up good but when in gear if you slowly apply the gas it goes but wont go above 35mph if you stomp the gas to the floor or over half it dies and falls on its face. it dose have 11psi of fuel pressure and their is no cat I built a true duel system for it. No codes need help.