Rog6679

Ok, so I have a 2004 converted to a 3V
Today I changed the cam sensor and road test and it was fine. The car came with an SCT tuner and the check engine light was not illuminating, so I programmed the car back to stock. After that the car will not start. I checked the fuel pump out and all wires at the connector are getting power to them. I can't find any wiring diagrams anywhere. I am starting to lean towards the ECM being no good.
Any other input would be great

Z28KLR

Have you had it running with this engine before? What PCM is in the car, the stock one or one from a 3V car?

If stock PCM, there's your first problem.

Help us help you. The more detailed info you can give about the car and the swap, the better. Your 3V engine swap is pretty rare on these cars, mostly due to interfacing the S197 PCM needed to run a 3V engine with all of the other various SN95 chassis car electronics, fuel and emissions stuff.

Rog6679

Yes it ran awesome. It has a 03 gt ECM in it. All was well till I tried the tuner