Cal93sho
New Member
I have a 1993 SHO and want to swap the computer ECM from 1991, does anyone tried it or know if it will work?
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Swaping Gen1 ECM with Gen2 ECM?
- Thread starter Cal93sho
- Start date
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Phoenix
SHOHOLIC
If both are MTX yes.
If your 93 is an ATX , no.
If your 93 is an ATX , no.
twr
whoohoo
I tried an 91 (LOS) computer in my 95 many years ago. It wasn't very happy running with it.
Phoenix
SHOHOLIC
I got a B9B1 in mine :sun:
luigisho
SHO Member
Should be ok as long as the car has a manual transmission.
I think the big difference is if any have 'cali' emissions programming and the 'cali' emissions setup. I forget if that's only '89s or all GenI's. The emissions setup are already on your car (GenII). The computer has to be able to run it (or you could delete the egr and plug it up, but you have emiss testing there).
I think the big difference is if any have 'cali' emissions programming and the 'cali' emissions setup. I forget if that's only '89s or all GenI's. The emissions setup are already on your car (GenII). The computer has to be able to run it (or you could delete the egr and plug it up, but you have emiss testing there).
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I had no idea that each year of the 1st gens had a different computer
twr
whoohoo
All ATXs and California MTX cars have the EGR system. The above listed computer codes are all non EGR .
You can swap computers and delete the EGR or use a tuner and delete it. In CA they don't like it if you remove the EGR and wont pass you. I don't know if you have that problem.
Why??
Slo-Sho
It wasn't me!
I've always heard that B9B1 has a slightly more aggressive ignition timing curve. The knock sensor only does so much on those years.
Cal93sho
New Member
Because my car started running rough, RPMs dropped, and it sounds like a Subaru. I checked all the cylinders and all of them seem to have a spark, so I decided to try and swap the ECMs, I have a 1991 SHO in my backyard that I am using as a parts car on my 1993 MTX that I drive everyday, so I will not loose anything by swaping the computers, I just want to make sure that the older ECM will not fry any electronics on my 93.
Maybe you should pull the codes first before throwing parts at it.
X2 :swing:
Cal93sho
New Member
I probably could or should, but for some reason I don't have the check engine light on.
Doesn't mean you don't have codes. You probably have a couple codes.
Anyone know the CA codes for MTX EEC's? zak
