92 body/wiring harness, 90 engine which ecu?

[eclipse_16g]

i am putting my 90 motor into a 92 body with the 92 wiring harness in it. which ecu should i use? i have both just dont know.

 

[92AWDHX40]

wire harness if you have a91 94 turbo ecm will work but the 90 is different check vfaq for how to change a ecu pin wires.

 

[slvrbllt]

the difference between 90-92 and 92-94 is that the pins 14 and 6 have to be changed the rest is pretty much the same

 

[eclipse_16g]

so your saying just use the 92 ecu?

 

[TurboDSM90]

CAS, transistor pack, coil pack, throttle body, and intake manifold need to be from a 91-94 when you put that 90 longblock in. Unless you want to do some soldering, wire changes, and plug changes.

 

[eclipse_16g]

yeah i ripped my 90 wiring harness incase i would run into these problems i would just swap the connectors.

 

[jeffo]

I would swap the 1992 CAS onto the 1990 motor, so that it plugs right into the harness. As others have said, use the original 1992 coilpack and transistor. Otherwise I think it should fire up fine using the 1992 ECU.

 

[steve]

I usually recommend people consider the 90 engine a long block and use all the 91+ style parts.
The factory changed them for a reason and find good 90 style parts over time will be expensive and difficult.

You'll need the 91+ CAS, Throttle Body with TPS and ISC, coil pack and transistor, and fuel rail to convert the 90 engine to the 91+ setup. It may seem like a lot of work now but it's easy to swap before you drop the engine in and will make the car maintainable rather than a bastard half breed.

 

[eclipse_16g]

i have a 90 c.o.p. setup that is made to fit a 90, is that still usable?

 

[steve]

The difference is the plug. 90 style plugs have 4 pins and 91+ style have 3.

 

[92blutalon]

CAS, transistor pack, coil pack, throttle body, and intake manifold need to be from a 91-94 when you put that 90 longblock in. Unless you want to do some soldering, wire changes, and plug changes.

do you really have to change the intake manifold? or can you just swap the fuel rail?