Stagea throttle body sensor help rb25det neo

[Mussy]

Hi, managed to get engine running from a stagea to r34 gt4, all is well but slip light switches on full throttle at 5k rpm. And loses power. This throttle body has two plugs but i do not have the plug for the throttle body 2nd sensor as in picture.

question is what are the wires on the grey plug for?

Pictures attached many thanks for any help

the loom used from ecu to engine is a previous r34 turbo conversion loom but does not have the plug to connect into second tps sensor plug.

 

[GTSBoy]

The pictures are a little confusing.

1. I was under the impression that GT4s did not have traction control. So why do you have a traction control throttle body on your crossover pipe?

2. Ditto, Stageas, even turbo Stageas, do not have TCS either.

3. What engine loom are you using? The original car's, or the one that came with the engine? Are you sure the one that came with the engine is actually from that engine? See question 2....

There are 2x grey loom plugs on that part of the engine. One is on the loom and clicks onto the Neo's boost sensor at the rear of the cam/coil covers. The other hangs off the traction control motor (front side of the crossover pipe, down low) and runs left and forward to a bank of 3x loom plugs located at the front end of the plenum. But depending on the provenance of your loom and the engine and that crossover pipe, you might not have everything. You certainly have things you shouldn't.

[Mussy]

Hi thanks for the response so the engine is a stagea neo turbo, it has one tps sensor with 2 plugs coming out of it. The engine was complete as in picture.

the loom installed is from a previous car that was a r34 gtt non turbo loom converted to turbo loom. 

 

have zero fault codes, have the odd occasion where the 4wd light flashes, and the slip light flicks on full throttle only.

Currently running a stagea turbo ecu.

its a mix of everything 😂 its runs good just full acceleration the car hits a wall and backfires. But if throttle is feathered in will go redline.

 

in neutral will hit redline no hesitation.

did notice the rear attessa pump was really hot as burnt my hand from it not sure if it is meant to get super hot.

what i need to know is on non tcs cars is there only 1 plug with 3 wires? 
 

the car itself there is no tcs switch was originally r25de non turbo manual 4wd.

 

 

 

[GTSBoy]

OK, so after a closer look at your first photo I realise that while the body of the TCS throttle is present, the motor isn't really there and it looks like the TCS TPS is not present on the back. So you should not have any wiring coming out of the three bolt cover on the front, or on that block of alloy on the back.

That leaves just the main throttle body (the part closest to the plenum). To the best of my knowledge, the main throttle body and its TPS is the same between TCS cars and non TCS cars.

What do you mean by "the throttle body has two plugs"? The main throttle body TPS in your photo clearly has one bunch of wires coming out the TPS on the front, and these should go to a loom plug at the front end of the plenum, as I described above. You show that grey plug with 3 wires, but you do not say where those wires come from, apart from "out of the throttle body". But where on the throttle body? Are you sure?

As to the driving behaviour. Are you running >10 psi? The stock ECU will chuck the shits at you based on the inputs from a number of sensors (the AFM and the boost sensor primarily) if it thinks you're pushing it harder than Nissan wanted, which is not very hard at all. If you are, you should really have Nistune in the ECU.

 

[Mussy]

this is the tps on throttle body, the grey plug is not connected, what is the grey plug for?

the wires from this do they need to be connected? 

also car is standard no boost controllers 👍

[GTSBoy]

Both the black plug (red/white/black wires) and the grey plug (yellow/green/brown wires) go to the location at the front of the plenum.

I didn't recognise the wire colours in your first photo of the grey plug because they are so dirty.

[Mussy]

That is correct what are these wires? For grey plug

[GTSBoy]

I don't know. Look at the wiring diagram?