1jz MT on jza70 AT ECU

[scottiedawg66]

hey there everyone. I am excited to try a different ECU in my car, but I ended up i with an AT ecu for my MT car with MT 1jz harness. I have searched here and SF for the neutral safety switch mod and I could not find anything conclusive for the MT harness. Can anyone share what I need to do here to run the AT ecu in my MT car?

 

[scottiedawg66]

just to close the loop on this idiotic thread I plugged the AT ECU in and my MT ecu and harness car fired right up and drove. the breaking up issue has gotten better, but it still feels like I have weak spark above 5000 rpm.

 

[Dylan JZ]

A/T ECU can be used regardless without issue.. You just can't use a M/T ECU in an A/T car, at least that's what I've found.

 

[k20maniac]

correct, you may also want to check the gap on your plugs.

 

[scottiedawg66]

correct, you may also want to check the gap on your plugs.

thats an entire other thread! but yeah I have replaced the plugs and gapped em down to .025

 

[ma70suprawoner]

i used to have break up in my 1jz at about 3500rpms and then i gaped it to 0.23 and now there is no issue you might just want to tighten that gap and see if it helps