the blue blur

So i have a 500 EFI that i've been putting together.

I have the mefi 3 harness for it but im missing the ECM and it is very expensive / hard to find

I have a MEFI 1 ECM and harness...

Can i run the motor with a mefi 1 harness and ECM I plan to keep this motor stock and run with a 500 efi bass map?

Will this even work?

sutphen 30

you can run it but you will need to tune the ecu.

the blue blur

Perfect thanks

Young Performance

You can do it but it is a HUGE step backwards. I may have a Mefi 3. If so, I can load a 500 efi cal in it.
Eddie

BUP

^^^ totally agree and will add MEFI 1 has a totally different mounting pattern and is 6.5 inches long center hole to center hole. Has 4 mounting holes. Also the J1 and J2 connectors mount on the sides of the MEFI 1 ECM.

retail is 2417 bucks for the MEFI conversion from MEFI 3 to MEFI 4 and you got one hell of deal offered to you in your wanted ad and do not even know it. 1600 bucks for the MEFI 4 conversion. FYI MEFI 3 currently NLA unless you buy used.

Again this is even an upgrade doing the MEFI 4 conversion brand new with a warranty for 1600 plug and play.

Buy the time you spend for MEFI 1, then spend someone to dick around with about 4 to 8 recals and who knows if that will be even correct -

then you will need to fab a correct mounting bracket that will accept the side plug ins for the J connectors. By the time it is all said and done plus the months that you and the tuner will take to get it right ??? if even getting it right - plus the devalue of your engines with MEFI 1 - just saying.