1G Using a 90 ECU with other year parts

[Noranuzoki]

If you look closely, you'll see I say it goes to the ECU and gauge cluster.



No you can't, you still need the 90 style Tach Gate driver on the coil pack to operate the 90 gauge cluster. The whole reason for the swap like this is to fix the problem with the tach in the gauge cluster acting up when a 91+ ECU is swapped into a 90 car.

The solution is to continue feeding the tachometer gauge with the original circuit from the coil pack and use the new signal from the power transistor to feed the ECU what it expects.

So is there anyway to retain the 90 ECU or must it be swapped as well? I'm assuming that if you don't then the car won't be able to communicate with the 91+ hardware installed.

 

[steve]

Well, there is still something wrong with your TPS. Either not adjusted correctly or wired wrong.
IPS also isn't working, that may be due to a missing throttle body ground.
As noted the ECT (CoolTemp) is disconnected. That by itself has caused cars to have starting issues.
You have the ECU configured to have a MAP sensor connected to the FrontO2 input.
Showing 3 DTC's all MAF related. Clear the faults and check again. If they come back there is something wrong there. Could be MAF or the wiring adapter.
I assume the ~950cc injector adjustment is what you intended and have.

I wouldn't expect much in the way of an idle with the ECT and IPS not working.

 

[Noranuzoki]

Well, there is still something wrong with your TPS. Either not adjusted correctly or wired wrong.
IPS also isn't working, that may be due to a missing throttle body ground.
As noted the ECT (CoolTemp) is disconnected. That by itself has caused cars to have starting issues.
You have the ECU configured to have a MAP sensor connected to the FrontO2 input.
Showing 3 DTC's all MAF related. Clear the faults and check again. If they come back there is something wrong there. Could be MAF or the wiring adapter.
I assume the ~950cc injector adjustment is what you intended and have.

I wouldn't expect much in the way of an idle with the ECT and IPS not working.

It was a complete error on my part. I have not fully familiarized myself with ECMLink. I have 2 sets of injectors so it was calculated for my 1000cc FICs instead of my 775ccs. I got the car running and idling okay. The rest is just trying to figure out MAFComp and getting my AEM Wideband to start working again. I have to replace the connector for the IPS and the ECU coolant temp sensor as well to get her idling her best. The MAF DTCs have not shown up since logging data. Just the coolant DTC. The IPS is not showing that it is fluctuating at all (it just stays at 0).

Anyway, thank you guys so much for helping me through this