3sgte ecu swap - Toyota Nation Forum : Toyota Car and Truck Forums

***2wickedtoyz*** · 03-19-2006, 07:44 AM

can i wire in a 3sgte ecu into my car since it already knows what to do with boost?
i'm still going to use my 5sfe motor but i want to use the 3sgte ecu. is there anything stopping me from doing that?

JetspeedCamry · 03-19-2006, 08:42 AM

Why would you want to do that? Surely they'd be mapped differently?

fredk · 03-19-2006, 08:43 AM

the pinouts and wiring are different

***2wickedtoyz*** · 03-19-2006, 09:11 AM

to clarify: the 5sfe engine is an economy engine with an na setting for the ecu

the 3sgte engine is a performance engine with an fi setting for the ecu

they are for the same family of engine and the pinouts wouldnt be a problem.

fredk · 03-19-2006, 09:31 PM

ya sure about that?

RichieRichJP · 03-19-2006, 10:59 PM

You should be able to keep your 5sfe one. Once you're boostin, get a 3sgte ems. I mean, 3sgte base boost shouldn't be too much more than 7psi that the engine can already handle

5Sfte · 03-19-2006, 11:21 PM

It would not work based on the fact that the ignition system is totally different.

JetspeedCamry · 03-20-2006, 07:43 AM

I completely disagree with everyone except Fred....it will not work!! You cannot just put an ecu from another engine, with COMPLETELY different mappings and expect it to work...even if you did customize the pinout!!! It's like me trying to put a 5VZ-FE ECU into m 2VZ-FE powered car because the 5vzfe is "larger" and would accomodate more fueling...not gna happen!

88 LE · 03-20-2006, 08:06 AM

Quote:

Originally Posted by 2wickedtoyz

they are for the same family of engine and the pinouts wouldnt be a problem.

Well their both S series engines, but they are different.

You can't just slap on a ECU for a different motor and expect it to work with your motor. Even if you did get it to work, the fuel & ignition timing maps would be wrong.

Both motors have different fuel requirements, ignition timing, and airflow characteristics.

You want to play with ECUs and tuning, buy a aftermarket standalone.

mike7869 · 03-20-2006, 04:30 PM

if u do want to go through with it.. even though it won't work.. i have an ecu i can buy of a mr2 turbo.. 94ish... but i don't think it will work...

***2wickedtoyz*** · 03-20-2006, 04:39 PM

ok close this thread i got my answers i will have to go the otherway

RichieRichJP · 03-20-2006, 05:24 PM

Quote:

Originally Posted by 88 LE

You want to play with ECUs and tuning, buy a aftermarket standalone.

I plan on running a stock map on a standlone AEM EMS for the 3sgte on a stock MAP until I get dyno tested and boosted. Since everything is fully programmable, there shouldn't be any problem of this kind on a 5sfe ecu should there? I'm just wondering what I should do about the OBDII...

88 LE · 03-21-2006, 02:13 AM

Quote:

Originally Posted by RichieRichJP

Since everything is fully programmable, there shouldn't be any problem of this kind on a 5sfe ecu should there?

Well if your using a standlone ECU, the stock one goes bye bye. You don't use the stock ECU anymore.

There shouldn't be any problems other then getting it installed, working, and tuned.

Quote:

I'm just wondering what I should do about the OBDII...

OBD-II will not work, as your no longer using the stock ecu.

RichieRichJP · 03-21-2006, 06:34 AM

Yes thank you! My evil plans will work after all muhahaha

white90dx · 03-21-2006, 02:07 PM

Quote:

Originally Posted by RichieRichJP

I plan on running a stock map on a standlone AEM EMS for the 3sgte on a stock MAP until I get dyno tested and boosted. Since everything is fully programmable, there shouldn't be any problem of this kind on a 5sfe ecu should there? I'm just wondering what I should do about the OBDII...

Crank triggering will be a problem if the AEM is set up for the 3s-gte and you use it on the 5s-fe. Good luck, I hope you or your shop are REALLY good with wiring/electronics and custom work.

-Charlie