1994 MarkVIII OBD1 TO OBD2 swap

94m5

94m5

Dmaup's Daddy
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Ok, I know I said I was done working on my viii for a while, but I've had some pretty cool developments occur that I can't pass up the oppertunity to persue.

I am picking up a 97 parts car that is all there electronically. What I am going to do is;

1 pull the 94 interior
2 modify the harnesses to accept full OBD2 compatibility for the engine.
3 install the charcoal gen2 interior.

I am going to attempt to keep the ECM as stand alone as possible. I don't really have to worry about the aux modules anymore because I am not running anything the car came with any more.

Should be an interesting project.

This thread will be used for pictures and updates.


Mike
 
Yay I love it!!! There's gonna be alot of cussin in this thread!
 
You will be dissapointed methinks....


This is about a 7 on a 10 scale on the hardest things I have done list.
 
here we go again. when we did the 95 pumpkin we changed the whole interior and air ride windows nav system. the 94 to manual the 94 to maruder 04,new doors ,new 6 speed i think i think we are learning about mark iiiv. wait we haven't tackled a conv yet. do i hear of a teacher chris? jd
 
94m5 said:
You will be dissapointed methinks....


This is about a 7 on a 10 scale on the hardest things I have done list.
Click to expand...

looks like your in for some fun! if this is a 7 what is a ten? cuz for me this would be a 12 lol
 
If you want to get a Gen-2 with the look of Gen-1 - take a Gen-2 and transfer fenders, hood, headlights etc. - it would be a much easyer way. Anyway, you'll get a 3-4 years newer car...
Also you can do nothing with the rear lights - they look quite the same, not as the headlight, and realy can stay, IMHO.
 
at first i was like: wow , i would love to go obd2, then i was like: no effing way ,too hard,

Then i was like: well this is Mike,i have seen what he can do.

so ,now i figure you will do it "relatively" easily and piss us all off.
 
Mike, You want my entire interior. It is in excellent shape. I was going to do this very thing you are planning before I found my CE, I got the entire inter out including the dash. Be prepared to a lot of things are different.
 
Hmmmm.... you know Mike if you are going to use the 97 interior you should just do a full wiring swap...
 
JDS353 said:
here we go again. when we did the 95 pumpkin we changed the whole interior and air ride windows nav system. the 94 to manual the 94 to maruder 04,new doors ,new 6 speed i think i think we are learning about mark iiiv. wait we haven't tackled a conv yet. do i hear of a teacher chris? jd
Click to expand...

I remember him saying ... I'll never swap an interior again ...

JD get the Expanding Foam ...:cool:
 
OK, I've missed the project car, sorry.
Can be done in like 2 weeks, every day after work & weekends. If the donor is OK, it will be like a puzzle: disassemble-assemble with new parts. Then test - and fin!
The only problem is that you want only ECU to be GEN2... it is quite tricky, Gen2 has a multiplex network with ECU integrated in it, maybe the only way will be to use all multiplex-connected electric units, incl. seats, steering column & door modules (that means that all the electric wiring from Gen2 must be transferred).
 
The ecu can be made to work with out the modules. But, the more I think about it, the more I think a complete wiring harness swap would be the way to go. I would only have to deal with the running lights and the stuff under the dash.

I'll keep the gen1 hvac system, and steering column.
 
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