I just did a 13bt swap in my 91 N/A and ran into some problems when it came time to start it up. We found out that when running on the turbo ECU, the Injectors where running wide open , flooding the engine out every time we tried to start the car. After hours of making sure we had everything hooked up, we decided to try and start the car using the N/A ECU. It started right up no problem. We opened up the 13bt ECU to check if the board had any burnt spots or bad solder points but we found nothing, the board looked brand new. I started to think maybe we might of done something to the harness when we tied the N/A windshield whiper harness into the control panel harness going to the ECU. I cant figure out what the problem is? Can anyone help me figure out whats going wrong here? https://www.nopistons.com/forums/pub...1047683561.gif

Do you have a 89-91 turbo ecu? and a 89-91 mass air? and 89-91 pressure sensor?

OH OH and what motor do u have///.... S5 or s4?

Yes Its a S5 and i do have the T2 ECU, Mass Air and Pressure sensor.

id say if you can plug in the na ecu and everything works, and it doesnt with the t2 ecu, the ecu is bad. there are only 2 pins different between the na and t2, neither one is all that big a deal (vdi and 6pi, vs knock and boost control)

would it be ok to run on the N351 N/A Ecu till i get the Turbo N374 ECU ?



Also ive read that the N374 ECU is from "Knight Sport" couldnt i just run the N340 ECU? http://www.infinkcdesigns.com/mazda/Mazda.html