mefi questions please help

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02-18-2009 | 08:32 AM

#11

kennyo

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Joined: Feb 2004

Posts: 3,710

Likes: 2

From: MT. JULIET, TN.

Quote:

Originally Posted by TylerCrockett

Mefi 4, 4a, and 4b are all pinned the same. You need to use the correct software level for each one. The 4b breaks the fuel and spark tables down to be more precise. I have new mefi 4 harnesses it is a lot of work to convert a mefi 1 harness over. Tyler

It is an involved process. But the ends are $40 and the harness is $400 so it's worth it to me. I'll tell you one thing though, I've never second guessed myself as much as I did doing that swap!

12-24-2013 | 10:01 AM

#12

asb929

Gold Member

Joined: Apr 2011

Posts: 19

Likes: 0

From: Michigan

I am looking for a mefi 4 harness for a 454 mpi.

12-24-2013 | 04:21 PM

#13

Young Performance

Registered

Joined: Jan 2004

Posts: 4,480

Likes: 43

From: Tennessee

Is it just for a stock 454 Mag? If so, there was never a Mefi 4 option on that engine. Any Mefi 4 harness for that engine will have to be a custom made harness. With that being said, we make our own harnesses for the Mefi's. Give me a shout if we can help or if I can answer any questions.
Thanks,
Eddie