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02 ECU step down adapter

558 Views 28 Replies 9 Participants Last post by  Y2KG20
Wtb: an adapter plug that will enable Roller*Rocker*SR's to use a B14/B13 ECU (i.e JWT ECU). I have seen some in the past come up for sale... let me know if anyone has one..
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bro, I think that only the 99 g20's can use b14 ecu's.......
bro, I think that only the 99 g20's can use b14 ecu's.......
I read somewhere that somebody had made sometype of stepdown adapter for the 00+... this would allow to use a OB2 ecu.
^ How can that work trying to step down from 32bit to 16bit ecu?

I would think you need to replace the entire engine harness in an 00+ to be able to use an earlier OBD2 16bit ECU
^ How can that work trying to step down from 32bit to 16bit ecu?

I would think you need to replace the entire engine harness in an 00+ to be able to use an earlier OBD2 16bit ECU
maybe im wrong.. im going to look for the link...
I saw the post on that too.. Pretty sure he wired in a bunch of 99' stuff and had to adapt this and that.... Looked like it would be easier to put a 99' harness in. Why not stick with the 32bit and aem/emanage piggy back it.
I saw the post on that too.. Pretty sure he wired in a bunch of 99' stuff and had to adapt this and that.... Looked like it would be easier to put a 99' harness in. Why not stick with the 32bit and aem/emanage piggy back it.
that may be the route that i might take..
Buy the 99 harness if you can find one. Make sure the injector sub harness is included. Then use a 99 distributor and intake manifold sensors (IACV, TPS etc) from a 99/B14/P10.
Buy the 99 harness if you can find one. Make sure the injector sub harness is included. Then use a 99 distributor and intake manifold sensors (IACV, TPS etc) from a 99/B14/P10.
I have been looking for one, for about 7 months lol.. but nothing..
I have an extra i might sell... no injector sub-harness though. And that might be even harder to come across.

Check your local wrecking yards and watch the car part outs here.
I have an extra i might sell... no injector sub-harness though. And that might be even harder to come across.

Check your local wrecking yards and watch the car part outs here.
Is it from a manual 99?
If I remember right it came form a car-part-out from a 99.
If I remember right it came form a car-part-out from a 99.
Is it from a 5spd G20 or a Auto?
Pretty sure it was manual, but I can't confirm that. I can spread it out and take pics if you are really interested. Like I said, I do not have the injector sub-harness for that one.
just get a extra RR ecu and crack it open for the ecu blue plug and pin a B14 ecu plug to it.
Pretty sure it was manual, but I can't confirm that. I can spread it out and take pics if you are really interested. Like I said, I do not have the injector sub-harness for that one.
Im interested pm me a pic with price..
just get a extra RR ecu and crack it open for the ecu blue plug and pin a B14 ecu plug to it.
What do you mean? What I think you are saying to do sounds too simple..
Bro, I say jus run a Emanage and call it a day.....my boi can dyno tune it for you
Im interested pm me a pic with price..

What do you mean? What I think you are saying to do sounds too simple..

I'll get it out and take a pic by the weekend if that's ok.
Pretty sure it was manual, but I can't confirm that. I can spread it out and take pics if you are really interested. Like I said, I do not have the injector sub-harness for that one.
I'll get it out and take a pic by the weekend if that's ok.
Yeah... no hurry..
I saw the post on that too.. Pretty sure he wired in a bunch of 99' stuff and had to adapt this and that.... Looked like it would be easier to put a 99' harness in. Why not stick with the 32bit and aem/emanage piggy back it.
would there be any CEL trying to go the same route in ny but OBDII are a pain with the CEL
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