GM 502 Accel DFI Trouble c

[dave w]

Interesting pic. I do not have experience with the Accel DFI system. A google search indicates the ECM you posted pics of is the DFI VI (6) system, which appears to be discontinued.

I'm guessing here, but maybe the 4L80E is being controlled by a stand-alone controller?

I think a good plan is to understand the Accel DFI VI system you have, before deciding a replacement fuel injection system is needed.

Hopefully the Accel DFI VI links below will help:
https://documents.holley.com/accel-d...ions_74022.pdf

https://www.amazon.com/Tuning-ACCEL-Programmable-Fuel-Injection/dp/1557884137

dave w