Ken N

Can a ECM4 be made to work inplace of a ECM3

Advantage 27

Yes, you just have to re-arrange the pins on the wiring harness since the MEFI4 pinout is different. Also have to get the 4 set up with the same configuration.

I have switched from a 3 to 4 a month ago and its working fine.

Ken N

Advantage 27

Where can i get the pin configuration information.

flabound11

Were you ever able to get the information to do this?

Young Performance

I have the pinout to go from a 3 to a 4 if you still need it. Give me a shout and I can send it to you.
Eddie

FogduckerIII

iTrader: (-1)

Not trying to hyjack, question along similar lines, can a 555 on a 496 be replaced with a properly programed MEFI4 ?

Is there a harness/plug adaptor that plugs into the 496 harness and changes the 555 plug to a MEFI 4 or am I talking out my as$.....?

bsboss

Interesting? Any body?

Young Performance

The only way to replace a 555 with a mefi is to change the harness. There aren't any adapters to convert it. The wiring harnesses are totally different.
Eddie

FogduckerIII

iTrader: (-1)

Thanks for that Eddie, do you know what MEFI harness would work on a 496 that is currently 555? Procharged application so would like to be able to program the ECM......

HaxbySpeed

Hey Jer, the harnesses are available from a couple different manufacturers, Volvo, Marine Power, Kodiak. Merc was the only one not using a MEFI on the 496. I've got the HO base program I can send you if you need it and may have a harness too. I'll check and let you know.