renagade_rotary

does the 12a use an ecu?

if so where the **** is it lol

gsl-se addict

iTrader: (3)

The 12a does have what you might consider an ECU. All it does is controls the different solenoids and such for emissions purposes and doesn't have any real control of the engine as the FI cars do. It is located under the passenger side floor. Pull up the carpet and you will see a metal plate. There should be two 10mm bolts and two 10mm nuts holding it in place. Remove the nuts/bolts and the plate and you will see the 'ecu' and related wiring.

Power Aids

could the ecu make the carb run strange?

aussiesmg

iTrader: (1)

No a carb is completely independant of the ecu it is not electronic you have a mixture problem or a leak needing a rebuilt carb.

renagade_rotary

this isnt an se(he screams after taking out the carpet)

gsl-se addict

iTrader: (3)

I know it isn't an SE. It still has a control unit that deals with the emission stuff (unless someone already removed it). I guess that you have an '83, so it is not in the spot where I said (sorry). That location does apply to 84/85 cars with the 12A or 13B engine. Here is where your control unit is located:



The control unit is at B-01.

renagade_rotary

so i need to remove the dash

aiight
now the connector that supplys that controller with power can fit the t2 ecu?

gsl-se addict

iTrader: (3)

No, I don't think you'll have to remove the dash. It is just under the dash by the fuse box and stuff. So you are doing a t2 swap then? I don't think that the wiring or 1st gen ECU will do a bit of good in that case. The plug on this ECU is completely different than the T2 ECU plugs. If you are doing a T2 swap, I would use the T2 harness to go between the ECU and the engine and then do your own wiring for the connections between the T2 ECU and the rest of the car (power, grounds, neutral switch, etc.).

renagade_rotary

i have the t2 harness for the engine
theres a third port connection on the t2 ecu anybody know what its for

gsl-se addict

iTrader: (3)

This should help you figure it out. They have the FSMs for S4 and S5 T2s and NAs.

http://www.teamfc3s.org/main/factory_service_manual/

You will want to look at the emissions section to see a pin out diagram of the ECU and the wiring section to see where it all connects to.