91 4x4 3.0 V6
ECU is cooked, like burnt, maybe caught on fire.
Anyway, with research I have discovered IAC (Idle air control) valve can cause issues with the ECU. I already replaced the IAC with the black one while rebuilding top end of engine.
Can the ECU mess up the IAC valve? I have given it like 6 miles and idled it for maybe an hour total after replacing the IAC. Just don't want to blow up another ECU.