Need Help Tranny Swap Check Engine Light..

[Lakey]

So i have a 96 mustang gt and the previous owner did the tranny swap from auto to manual and the check engine lights are on and i cant pass inspection what should i do buy a manual ecu??

 

[94GTCoupe]

Check stored fault codes first.


Also, if it was a proper swap, the ecm should have been swapped with a manual ecm.
pull the passenger side kick panel and ecm code.
it is printed on a sticker on the side of the ecm.

 

[TeamCaffeineGT]

Check stored fault codes first.


Also, if it was a proper swap, the ecm should have been swapped with a manual ecm.
pull the passenger side kick panel and ecm code.
it is printed on a sticker on the side of the ecm.

Exactly what davis3 said. Pull the codes! Then you will know what is up! Could just be an unplugged O2 sensor or something. Worse comes to worse, pull the CEL bulb. I had to do this with my engine swap due to and IAC out of range and a TPS voltage code. Passed inspection just fine.

 

[Lakey]

Just got the codes man...
po755
po1000
po1270
po750
po746
po713
po743
po500

 

[Lakey]

yea it definitely wasn't a proper swap. i have a tremec 3650 so i dont know if i can ever get these codes away. any suggestions?

 

[wmburns]

I suspect this a non compatible transmission speed sensor issue (OSS vs VSS). The 98 and older Mustangs use a VSS sensor. The 99+ uses an OSS sensor. The two sensors are not interchangeable (totally different signals) and need to match the PCM and wiring harness.

Research a tail shaft swap or an "extended range" SpeedCal.

 

['01SilverBullet]

Tx