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ST165 to ST185 ECU Conversion

Tue Jan 24, 2006 3:34 am

:D :D :D :D :D :D :D

Well, I wired up my 185 ecu to my 165 harness and it started up in -10deg. celcius!

I have to wire the IC pump constant and then take it for a test drive tomorrow.

Here's a pic of the adapter harness i made so I didnt have to hard wire everything up in -20 to -35 deg. Celcius weather. Also it allowed me to switch back to my 165 ecu if it didnt work.

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Tue Jan 24, 2006 3:40 am

What did you use to make the adapater harness? Aside from all the wire, I mean primarily the connectors..

Tue Jan 24, 2006 3:44 am

The green plug is the guts of a 3sge ecu, then i had to re-arrange pretty much all of the pins, then i soldered the corresponding wires to the 185 ecu plugs.

Ill have to see if my a/c still works as well.

No check engine light lit up either :evil:

Tue Jan 24, 2006 12:04 pm

wow good job dude.....thats alotta effort

Tue Jan 24, 2006 2:02 pm

wow really good job.... if all goes well maybe you should start producing these....

Tue Jan 24, 2006 3:14 pm

I would buy one.

Tue Jan 24, 2006 5:28 pm

The only trouble is finding all of the 185 harness plugs and finding a bunch of 1st gen 3sge/3sgte ecu's to take the female plug out of.

If you find both, I would probly be able to do it.

I still have to fully test it today though.

Wed Jan 25, 2006 3:49 am

Well i figure you could get the gen2 plugs from a 5th gen auto GTS, and a lot of Toyota ecus use the gen1 ecu connector. Good work Paul, can't wait to see it for myself.

Wed Jan 25, 2006 3:51 am

Ya, thanks Bryan, it was a team effort :D

Wed Jan 25, 2006 5:53 am

If you seriously consider producing these harness adapters, I am in very close proximity to 4 junk yards, and all of them have numerous Toyotas, and I know there are many cars in there with the plugs you need. Come this spring when everything isn't covered in a foot of snow, I can scout them out, see how many I can grab up and send them to you, I can prolly get each one for a few bucks

Wed Jan 25, 2006 3:32 pm

I'm also near some junkyards and since I'm in Florida snow isn't an issue. If you can tell me exactly what you need out of what car I can go down there this weekend and pull whatever you want.

This adapter may be super awesome if it allows me to run an AEM or E-Manage on my 165. So I'm down to help make another one and then experiment from there.

Thu Jan 26, 2006 9:29 pm

Well, I've seen people puttin the 205 ecu with the 185 harness, is there anyway to get it to work with the 165 without to many problems? It would be a way to get rid of the nasty AFM and use 540/550's relatively safely. Just wondering...



Fri Jan 27, 2006 5:48 pm

You would need to get a lot of the 205 sensors.

If its been done with the 185 harness, it could be done with the 165 with about the same effort. The 2 165/185 ecu's and harnesses arent very different.

Bryan (Flyin'Bryan) Is using his 165 harness to wire his 205 ecu to the 205 motor, but it required a lot of the harness to be rewired.

Wed Feb 01, 2006 2:22 am

Why is putting a 185 ECU on a 165 motor better??

I think I may be missing something!! :shrug: Could you fill me in??

Wed Feb 01, 2006 3:48 am

Oh, sorry, i have the 185 motor, but i was runnin the 165 ecu, which i didnt like the idea of.
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