My 87 5.0 has been running really poorly, i thought it was in need of a tune up so i bought new plugs,wires,cap, and rotor installed them and still had the same problem. thought it might be the timing, i checked that and it is still set at 10 Degrees. so at this point i was frustrated, i went and bought one of those hand held scanners, hooked it up and i am getting no codes from the ECU, not even the pass code. what could be the problem. if any of you mustang enthusiests live in the Clearwater area and feel like coming by my house to hear it run and trouble shoot with me please feel free. i Love my stang and hate to see it wounded and sitting in the drive way please help post here or PM me, thanks for your help!