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-   -   MEFI 1 to MEFI 4 on 350 TBI (https://www.offshoreonly.com/forums/general-q/215917-mefi-1-mefi-4-350-tbi.html)

tonybrouillette 08-30-2009 01:37 AM
MEFI 1 to MEFI 4 on 350 TBI
 
I have a 1994 350 TBI Indmar with a bad MEFI 1 ECM. Can I convert it to a MEFI 4? I understand I will need a new harness. Will a MEFI 4 work on a throttle body injection system? Will my knock sensors work? Do I need to install an oxygen sensor? Thanks, Tony

RichardCranium572 08-30-2009 09:18 PM
Originally Posted by tonybrouillette (Post 2942535)
I have a 1994 350 TBI Indmar with a bad MEFI 1 ECM. Can I convert it to a MEFI 4? I understand I will need a new harness. Will a MEFI 4 work on a throttle body injection system? Will my knock sensors work? Do I need to install an oxygen sensor? Thanks, Tony
The mefi 4, 4a, or 4b will work with tbi, the mefi 1 used a knock module as an interface to the ecu... you will need mefi 4 knock sensors, no you do not need an o2 sensor. Finding someone with any experience and/or cals for tbi and mefi 4 will be another story. ;)

I have new mefi 1's in stock if you need.

Young Performance 08-30-2009 10:37 PM
And what do you know about a Mefi????:lolhit:
Richard Cranium is the man with a Mefi.

I have a used Mefi 1 that is in great shape.
Eddie

RichardCranium572 08-31-2009 12:50 AM
Eddie, did you just call me a dick? :D :P

Young Performance 08-31-2009 08:04 AM
No......dickhead!!!:lolhit:


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