MY05 WRX Link G4X plugin with sensors

[CraigyP]

Just chasing a bit of information on the above to make sure I have all the parts for my tuner. I am looking to run two 150psi sensors for fuel and oil pressure, and the flex sensor for E85 blends. Besides the sensors themselves, is there additional wiring parts I need to pick up to get it all installed?

I have also picked up a can gauge, is the CANJST the correct cable to grab to get it to communicate with the ecu?

Thanks for your help.

[Adamw]

Yes, CANJST would be the easiest option for the CAN gauge.  For the other sensors, can you confirm whether you have the WRX104 or WRX107 ecu?

[CraigyP]

Thanks for the reply Adam. I haven't yet picked up the ECU, it needs to go into an MY05 WRX - last of the 2L engines so happy to take a recommendation. I had been looking at the  WRX9X for this application?

Thanks again.

[Adamw]

11 hours ago, CraigyP said:

last of the 2L engines

Hmm, maybe in america.  JDM STI's use the EJ207 right up to around 2018/2019.  

Does your car have the 5 plug ecu/loom like our WRX9X?  

[CraigyP]

I should have been more clear - this is an australian delivered wrx, MY05 Applied model E. I pulled back the carpet and took a picture, looks like 5 pin?

Thanks

[Adamw]

Ok, yes you will want the WRX9X ecu for that one.  

For the flex sensor,  this needs to be connected to a digital input.  The most convenient option to access a digital input is to buy an expansion harness.  There are a few spare DI's on the expansion ports.  This is the expansion loom: https://dealers.linkecu.com/XSL_2

For the 2 pressure sensors, there are a couple of options.  These need to be connected to analog inputs.  There are a few spare analog inputs on the expansion ports so 1 option is to use the same expansion harness as the flex sensor.  A possibly easier option assuming you have removed the TGV's, then you can use the old TGV sensor wires.  These conveniently give you an analog input, 5V and sensor ground already routed to the engine bay and finishing on each side of the engine probably somewhere around where your pressure sensors will be located.