manual tranny ECU replacing.... Options

[miro1975]

Hy guys.
Quik question. I going to replace ECU for manual on my car, because I was running with auto ECU about half year and I was having problems with accelaration. Anyway. I did 't check yet and I think it should not be a problem to change it.
Well here is a question. Does manual ECU plugs right in or is there anything what should I know before start swaping.
Thanks a lot...

[Coomer]

You'll probably want to compare pinouts on the two ECUs. You can pull the board out of the ECU housing once you take out a few screws and then there might be pinouts printed on the board that you could compare.

My AE101 ECU had pins printed, while my AE111 ECU didn't.

[miro1975]

I'll try to do that if I will have any problems. Thanks man.

Anybody else out there who did auto to manual tranny swap?

[hurley97]

I have a swapped manual. my M/T ECU plugged into the A/T harness, theres just extra things that aren't used... but I have a 97 and used a 96 ECU so its all OBD2, I'm not sure if OBD1 is different.

go for it. worse comes to worse just plug back in the A/T ECU you've been using and look for another solution.

[miro1975]

That's what I did. I was playing with it and did't work. I got 94 Manual ECU and my car is 95. On ECU box, there is 3 plugs in there. 1st from the left is longest one, next is short one and last one is kind of longer again. That's for auto ECU. For Manual 1st and 2th is the same as auto ECU but 3th one doesn't fit (shorter). What should I do? Anybody has try this before??? Thaks

[Coomer]

If that's the case, you need pinouts for both ECUs and the smaller plug for the manual ECU, which can probably be found on a Toyota in the junkyard.

Then you need to compare pinouts (for all three plugs, not just the different sized one to be sure) and move pins around to the correct locations. You can do this easily by de-pinning plugs.

[miro1975]

Thank you guys. I just going to rewire the last conector to last one from manual ST celica. I thing that is going to help.
I think I just wait for spring, because is crazy cold right now and we got just one heater. Well, I'll let you know and hopefully take some good piX. Thanks again for help..

[Batman722]

you swapped trannys and you're still running your A/T ECU ? (I'm just not sure I understand the situation), if that's the case the auto ECU should work just fine. What kind of accelleration problems are you having ?

also, you can pick up any 94-95 ST M/T ECU and I'm 99% sure it will work for you. Either look for someone parting out their car or check ebay if you don't want to re-pin anything. I'll check my stuff when I get home later today.

[miro1975]

Yes I'm running my a/t ecu and everything is perfect, but when you got 4 or 5000 rpm and try to dump the cluch it will hasitate and drop your rpm and you have to play with a cluch make it launch ( autocross or drag strip from the line). I think a/t ECU has some kind of limiter. With auto tranny, when I was holding gas pedal and the brake it would't let it go higher then 3000 rpm. So I thing that's what is going on, and that's why I want to swap auto for manual ECU. Well, I'm open for any suggestions.

[Batman722]

I know that the A/T ECU does have a lower rev limit than the M/T ECU, that could be your problem, or could just a spark problem, maybe your plugs are fouled.

[miro1975]

Plugs are OK (new). Must be just that A/T rpm limiter. Car runs great and I never had any problems at all.
It just at 1st gear when you trying actually launch it at 4-5000rpm with just dumping the cluch and go. That just one time that hapens. Even that is not hapening every time.