I feel bad for him too, haha but it’s nice to have someone else in the “I fried my ECU” club. (Tach install gone wrong on my Sentra. Didn’t really know what I was doing and I was careless. Stripped one wire, wrong signal. Stripped another wire, wrong signal. -notice that I didn’t insulate the first wire when I was done- ZAP they touched and arc’d. Get this: The engine wouldn’t STOP running. I had to unplug the coil to stop it then unplug the battery to get the ECU to stop pulling 12V and draining my battery.)
Anyhow, I’ve got a sneaking suspicion he did one of 2 things:
- Ran 12V from the relay input, essentially trying to power the fuel pump off the ECU’s output signal, overamping the contact and frying it
- Jumpered the signal side of the relay, shorting the ECU output to ground, overamping the contact and frying it.
Either one would be good news at this point because it would mean that he doesn’t have another problem to fix before he can put in the rebuilt ECU.