ok got an issue i cant figure out. within the last month i have had my head at the mechine shop for a burnt valve cylinder 4. valves been replaced, seated , cleaned, re-surfaced,and adjusted. after getting everything back together i develoved a cylinder 1 misfire. replaced plugs, wires, dizzy cap&rotor. switch injectors and still have a cylinder 1 misfire. problem is that it only miss between 2-3000rpm. today i just checked the pulse on each cylinder from the injector harness and its pulsing in all cylinder but cylinder 1 seems a little slow too me like its missing a few pulses(could just be me hoping to find an issue). changed resistor box still same problem exist between 2-3000rpm. motor had 302,000 miles on it doesnt blow any smoke out the tailpipe. need help completly out of ideas. my next move is too switch ecu. any ideas or suggestions is welcome.