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Engine Conversion On R33.

DEVIL
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DEVIL Apprentice

DEVIL

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Hey guys & Gals.

Ok i've just spent ages doing searchs and alot of reading but i haven't been able to find deffinate answers.

I've got a customers R33 that had an S1 RB25DE Auto, and i've got a half cut S2 RB25DET Auto.

The differences i found straight away was the ignitor for the coils and the TPS. The engine to ECU loom although having different plugs for both the ignition system and the TPS have the same ECU pin out! Also a plug size and wire number differece between the AFMs.

There is a difference between the S1 Auto and S2 Auto loom. ONE wire. On the 8pin brown plug... with the S1 DE loom there is a pink wire making the 8pin plug full. On the S2 that wire is not there but all other wires are and are the same pinouts.

The problem i'm having is that it will not start (turn over) like the gear selector is not in Park.

So here's what i'm using... S2 DET motor, with S1 DE loom, S1 DE coils with ignitor, S1 DE AFM and S1 DE TPS. I'm using the S2 DET ECU.

Also using the S2 DET Auto loom. (Which could be the problem).

Durring my searching and reading i found that someone had used an S2 Motor with S1 ECU. But they didn't mention which loom, ignition, tps or AFM they used.

Cool so if anyone of you knows what i'm on about here please feel free to help out. The customer is being a real pain in the arse ringing up atleast 4 times a day even after i explained everything to him and he agreed that he understood when i said that it wouldn't be finished untill next week. Then comes into the shop like a gangster with all his "tough" cousins every second day.

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DEVIL Apprentice

DEVIL

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Ok... Just thought that i should post this up for anyone else in the future that might look up on this subject...

It wasn"t starting due to an earth cable not being connected properly!

So just to cap up i"ve got a S1 R33 RB25DE Auto.

I used the Loom, TPS, AFM and ignition system from the S1.

Using S2 RB25DET motor with S2 ECU (Auto).

Starts and idles purfectly!!! Just about to take it for a test drive... just going to hook up a boost gauge and putting in a manual bleed valve boost controller as i"m not using any of the factory solenoids there!

Will let ya"z know how it goes!

DEVIL Apprentice

DEVIL

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Haha thanks man!!!

Ok... so as i mentioned before, there was a single wire difference between the S1 and S2 gearbox loom. I dont know if it's because of S1 to S2 or DE to DET.

I found that there is a difference between the two dashs. With the S1 DE dash in the speedo was off, put in the S2 DET dash and it was ok!

But i'm wondering if it's the gearbox difference.

The remaining problem is that the auto box isn't "auto changing" like it's stuck in "snow mode".

I'm guessing the problem is between the S2 DET box and the S1 DE auto box controller still in the car.

Going to try changing the loom and gearbox selector etc tomorrow. If that doesn't work i'll just have to change all the loom/s over and the Auto Controller!

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