Well I really did it this time grounded out of applied voltage to my MEFI3 fuel pump driver output. Looking for someone to rebuild or a good used ECU. 7.4 MPI serial number 0M007735 . Can any one help? Thanks ! Mr C

I had my MEFI 4Bs sent to Maic for repair and checking. Not cheap but good and fast. He has MEFIs for sale and may have one that your tune can be transferred to. It is not uncommon to blow the fuel pump relay in them. It does shut down the ECM but can be worked around. I have one MEFI that has a bad fuel pump relay for a spare. The unit was reset and is fully functional except for the fuel relay. If needed I will run a hot wire from the ignition switch to the fuel pump and to the ECM to get it all to work. Talk to Maic and he will get you running again.

703-505-5234 is his phone.

www.maicsalazardiagnostics.com

YouTube Channel MSD