94 Car with 95(?) Transmission

[Gojira94]

Back from the dead thread.

With the help of some folks who do lots of GM EFI tuning on another forum , it was determined that the tune was bad. The 94 PCM mask was still used and the tables that are normally empty for PWM control were filled with 95 PCM data. This would never work because when the PCM reads its mask info it treats the normally empty areas of the EPROM as empty, no matter what.

So I got hold of a factory 95 tune and did it myself, basically not much more than doing the O2 sensor relocation since it has headers and duals. The guys at the other forum verified for me that everything was good and it was 95 code and the PCM was reading the tables for PWM.

It still throws a silent code 84. My last idea is to pull the internal solenoid harness, thinking it may be a custom harness of some sort or is just faulty. First pull it and clean it and check the pinouts vs what it should be in the wiring diagrams.

I'm just out of ideas...