I have a 97 ITR motor in my 94 GSR body so that leaves me a OBD2 harness. I'm tired of using chipped ECU's...I want my car at stock performance. Also, chipped ECU's are cutting off my AC switch...frustrating during this heatwave.

So do I get a OBD2 to OBD1 harness and use my stock GSR ECU which may lessen performance or how can I use an ITR ECU (do I need mods or will that hurt performance too)? For some reason, I was told I couldn't use the stock ITR ECU.

HELP!

 

Do you have a JDM ITR engine, or US? Did you use the 94 GSR wiring harness? (the one in the engine bay and the one that feeds into the cabin)

If you have a JDM ITR engine, you have no vtec pressure switch/solenoid. I'm not sure of the ins and outs of wiring for a JDM engine, but it does (most of the time) require some re-wiring.

If you have a USDM ITR engine.... which would be wired for obd2a, you could use a 97/98 ECU, as far as I know. But if you still have the obd1/gsr wiring... blah. See how confusing this is?

You might want to check with the hybrid/swap guys. I have some experience with this, but each wiring harness is a bit different, so there may be an easier way, or it may be harder than I just mentioned.

 

there's only a few minor differences between a gsr and ITR wiring harness.. the biggest being that you don't need a plug on the IM.. you can just tape it off.. and and OBD1-OBD2a conversion harness should take care of the rest..

I'm not sure how the A/C isn't working because of this stuff though.. at least not because of the ECU.. maybe you didn't hookup your A/C properly when you did the swap..?

 

Yes, I have a 97 JDM ITR motor in my 94 GSR body using my stock GSR wiring harness with a p28 Skunk2 chipped ECU. Sometimes it cuts off the A/C, sometimes it doesn't. But when I use my stock GSR ECU chip, A/C ALWAYS works. It's weird. I just want my car stock dammit...with everything working =D So what should I do?

 

some ecu programs cut off the a/c at a certain rpm

 

Mine cuts it off period.

 

Or at WOT

 

want car stock? use stock parts.. ie, either GSR or ITR ECU.. Or get one custom programmed to not shut off your a/c(or ask manufacturers if theirs does, and buy one that doesn't that is pre-programmed)..