gen 3 MR2 ECU running ST185

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Re: gen 3 MR2 ECU running ST185

Postby Smaay » Sun May 22, 2016 5:18 am

ok its THAM, I dont see any reason the same signal cant feed both inputs? splice it to both. has anyone ever done this?
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Re: gen 3 MR2 ECU running ST185

Postby alltracman78 » Sun May 22, 2016 11:45 am

It might work. I don't know how much the ECU cares about the IAT signal.
But keep in mind it does compare the two. IAT is pre turbo and ic so it will be cooler. Or should be.

I would just wire one in, they're really easy to find.
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Re: gen 3 MR2 ECU running ST185

Postby Smaay » Tue May 24, 2016 2:31 pm

I went back through my notes, On the 3rd gen i swapped in the G/Fs car, I dont think I even used THAM. I put the THA sensor in the intake manifold and thats it. Car runs like a bat outta hell. Maybe its not needed????
2001 Celica GT-S 2ZZ-GTE
90 Celica All-Trac 3S-GTE
97 Supra 2JZ-GTE
97 Celica GT 3MZ/1MZ hybrid
Smaay
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Re: gen 3 MR2 ECU running ST185

Postby Smaay » Wed Jun 22, 2016 8:42 pm

Well i got everything hooked up. I installed a 3rd gen igniter, added the THAM sensor. fired the car up and checked the timing. It was back to 5 degrees. moved it up to 10. car runs good, it idles really high 1700 RPM. then it settles down to 1100.

I lost the wideband because I installed a stock O2 in that position. The car doesnt seem to make much power. I dont have a boost gauge set up yet.
2001 Celica GT-S 2ZZ-GTE
90 Celica All-Trac 3S-GTE
97 Supra 2JZ-GTE
97 Celica GT 3MZ/1MZ hybrid
Smaay
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Posts: 326
Joined: Sun Sep 12, 2004 3:55 pm
Location: Palmdale, CA

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