92 mustang gt t5 conversion

[Blckz]

I recently completed an AOD to T5 transmission swap in my 1992 Mustang GT. The swap went smoothly overall, but I have encountered an issue where the engine does not rev past 3,000 RPM without experiencing popping and misfiring. However, if I disconnect the transmission harness or depress the clutch while holding it, the engine can rev freely without any issues. I am seeking assistance from anyone who may have encountered a similar issue after performing a transmission conversion.

 

[90sickfox]

Thats a new one for me.

 

[AeroCoupe]

Need to know exactly what you swapped when you did the conversion. Harnesses, ECU, changed wiring pinouts on existing harnesses, bypassed the clutch switch, etc.

 

[Noobz347]

Check voltage at the coil with your suspect connector, connected and then disconnected.

Pull EEC codes to see if there's anything for circuit faults.

 

[Blckz]

I kept the original automatic module I only swap transmission and t5 harness I also went back to auto harness for testing purposes is still had the same issue

 

[Noobz347]

Wiring Gremlins
Voltage on RPM sense
Rev Limiter