04-11-2024, 01:12 AM
OK, here we go: The attached photo shows the permanent fix of code 51 by soldering a 10k resister between pins 16 and 24 of the B50 ECU. The code 51 goes away and only code 12 (normal) remains, CEL stays off. The resistor is on the bottom side of the ECU board, so the board has to be removed from the case entirely to do this, simple, just 6 screws. No external wiring required, no EGR required, so far as I know. Off road modification. May be OK in some states and with some vehicles for street use, particularly as applied to engine swaps.
Feel free to use this photo however you like, just post my name with it. (Jim Blackwood)
The start and idle may have improved, still too early to say for certain but so far it seems better. I'll know more in a few days.
Jim
Feel free to use this photo however you like, just post my name with it. (Jim Blackwood)
The start and idle may have improved, still too early to say for certain but so far it seems better. I'll know more in a few days.
Jim