RB26dett R33 gtst swap

[r33.antwone]

hello wanted some insight on what my problem could be so i swapped a RB26DETT into my r33 gtst used a R33 GTR engine harness and im using a haltech platinum pro. The car cranks but no start the ecu isn’t getting any power now im trying to find out why i cant seem to find any schematics  or diagram for the engine harness for the r33 gtr anything helps thank you.

[GTSBoy]

Start with the R32 GTR wiring diagram. The ECU is essentially the same, so the pinouts are good. The details around ECCS relays, etc might differ a little bit, but the reality is that you need to get ignition power to kick the ECU so it powers up the ECCS relay which brings the rest of the ECU up. This also gives power to the other circuits that are needed to make the engine run, like the ignition coils, etc. All of this is visible on the R32 diagram and should give you a strong guide, even if it's not quite the same as the R33.

As to specifics - I'm pretty sure no-one can help you from afar, as there is no way to know what mistake or omission has been made in connecting stuff up. It always turns out to be "LOL, I shorted something and an entire wire vanished out of the loom", or "We never connected X or Y main connector", or "shit, you mean I need to have that fuse installed?".

[MBS206]

I'd also look at the Haltech wiring guide, check what pins THEY think are in which spot.

In the R33 GTST there is a wire that needs swapping for the PowerFC to function properly. I believe @Duncan will have more info specifically.

 

I won't be surprised if it's a similar issue, or as GTS said, it will be something super odd. Basically, you'll need a multimeter and probing the power and ignition wires. Heck, it could be as simple as the Haltech isn't set to turn the correct outputs on to trigger relays to power things like coils/injectors.

[Duncan]

That specific R33 GTST issue I ran across was putting a PowerFC into a series 2; it required a fuse added into an existing but unused circuit to fire up the PFC. That won't be the issue here as I assume the ECU powered up (OP surely would have mentioned if they couldn't connect).

As Matt said, Haltech do have specific information about wiring in the Platinum Pro where there are minor differences across the 2 row plug models (R32/R33 from memory).

Quick Start guide at this link: https://www.haltech.com/product/ht-055101-platinum-pro-plug-in-ecu/#

At a quick glance, it is more likely to be a local wiring issue than ECU wiring (eg that connector near the left headlight might have differences)

Start with the age old question....are you getting fuel and spark, at the right time