I'm a newb, I bought my car with the megasquirt 1 already on my car.

I have a s4 t2, but I was curious on wiring in a s5 or fd tps in. Do the pinouts on the ecu already exhist but are just empty, or do I have to purchase another part that would need to be soldered on?

the previous owner modified the stock harness, would I be lucky enough to just be able to use exhisting wires to just rewire?

 

I belive the s5 wiring should be the same. Are you changing intakes or just TPS?

 

You can use any TPS you want that you can physically adapt to the throttle body. The wiring depends on that TPS.

Somewhere around halfway through this video I show how to identify the wires of a TPS:


The S5 TPS has the same wire colour code as the S4, I believe.

FD is different but findable on this forum. However the FD TPS is far from bolt on. If you were going to go that route, I'd say put the effort into the Ford TPS. Easier to mount and available in stock at any auto parts store.