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Hey guys,

so im doing a RB25det conversion on my R32, i got this rb25 from a importer and they said it was a series 2 RB25det,

so i got a series 2 wiring loom, and had my wiring guy mod the loom to fit the rb25 and have all my air con work etc..., i went to hook up the loom today and i came to my first problem, the cas, where you plug it in was facing the other way (will add pic below) so the loom didnt reach it, so is this because its a stagea motor? or should i change the timing of it and face it the other way? im really unsure of what to do, i pulled the spark plugs out and they all had nice grey tips, no oil, so im guessing it was running sweet and i told it was running sweet, or do i just solder wire to make it longer? any info on that would be good,

and then i found my second problem, lots of people said you have to use rb25 accel cable, but my cable fitted fine and still was able to adjust it, didnt take much notice about it, but then i saw that the plug on my loom was 1 brown plug, and the engine i have has 2 plugs on the throttle body,

i spoke to the wiring guy as soon as i got the engine and told him it was stagea motor, and he was like shit, as long as it not a neo it should work, then asked about the cas and injector colours (apparently they are different from series 2 and neo, so do i just change the tps or what?

Thanks JV

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Hey guys,

so im doing a RB25det conversion on my R32, i got this rb25 from a importer and they said it was a series 2 RB25det,

so i got a series 2 wiring loom, and had my wiring guy mod the loom to fit the rb25 and have all my air con work etc..., i went to hook up the loom today and i came to my first problem, the cas, where you plug it in was facing the other way (will add pic below) so the loom didnt reach it, so is this because its a stagea motor? or should i change the timing of it and face it the other way? im really unsure of what to do, i pulled the spark plugs out and they all had nice grey tips, no oil, so im guessing it was running sweet and i told it was running sweet, or do i just solder wire to make it longer? any info on that would be good,

and then i found my second problem, lots of people said you have to use rb25 accel cable, but my cable fitted fine and still was able to adjust it, didnt take much notice about it, but then i saw that the plug on my loom was 1 brown plug, and the engine i have has 2 plugs on the throttle body,

i spoke to the wiring guy as soon as i got the engine and told him it was stagea motor, and he was like shit, as long as it not a neo it should work, then asked about the cas and injector colours (apparently they are different from series 2 and neo, so do i just change the tps or what?

Thanks JV

Your CAS is on the wrong way, turn it around so the plug will fit.

plug the tps plug into the bottom plug on the throttle body. leave the other un plugged. try that

o sweet as man, thanks, im guessing i will need a timing light when i start it up for the cas though?

Just put it so the bolts are in the middle then you can start it and use the timing light

I believe that second plug is for Automatics :)

Yus this is correct. My throttle body has both the connectors as well cos my was auto once.

  • 5 months later...

I swapped a RB25 S2 in my R32. I'm done with the harness (wiring the R32 dash plugs on the R33 harness) but what about the 3 TPS wires and 1 TPS power wire on the large incabin plug? Should these stay unconnected? And should I connect the 12V wire (engie bay plug) to the coil plug or will the ECU give the coil and injectors power?

Edited by BigC1988

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