Having a problem with my 93 GT 5.0 5spd. It's running poorly and i need some insight to a possible wiring problem. Tried to run my KOEO test today and it wouldn't work so I had to run a wire from the battery ground straight to the STI trigger to get the test to start. Came back with these codes: 21 coolant temp sensor out of specified range 22 map sensor out of specified range 23 throttle position sensor out of range 34 EVP voltage above closed unit 67 Nuetral drive switch or circuit 81 Thermactor air circuit 82 Thermactor air circuit integrated controller circuit Second set of codes were 22, 34, 51, 53, & 54 which are just more sensors out of range. Am I right in assuming I have a broken signal return wire somewhere due to the fact that it connects to just about every problem I'm having right now. Codes and the KOEO test not wanting to start?