Quick questing about getting power to my ecu. Someone experienced please chime in - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Socalgal · 05-09-2011, 02:43 AM

So my fucking "turn key swap" purched from a member here didn't work. It came with a s15 motor, harness wired for a s14, a power Fc, a stock ecu, a few other things but was of corse missing some of the very important things we had discussed. When the pallet arrived I noticed it was missing things and of corse the seller is not returning my calls. Because of this I figured I need to start testing everything. My main concern (other then the motor itself) was the PFC and harness. Got everything in and of corse the PFC won't power up with the key. The stock ecu does work but I do not have stock injectors or mafs. I had this same thing happen with my s13 sr when I first installed the power fc, after tons of work I ended up buying a wiring specialties (great option, just broke and need a damn car)

So I went over the ecu harness and found that two of the normal power (labeled power as opposed to back up power) pins had nothing. All grounds had continuity. So I figured id put power to the two that was missing. I twisted those two together and jumped it to another of the main (non back up powers). Turned the key and the commander turned on. It was at this point I patted myself on the back and went back to the the turbo kit and all the crap I still have to do.

Is it ok to leave it like that? I thought nothing of it at the time but now I'm wondering if these are supposed to see power from different sources or something. I mean there all gonna see it from the batt but If that was the case there would be just one source coming in and be distributed inside the ecu. So if there coming from different circuits or something and need to be fused differently then what I did isn't going to be a perminate fix.

So is it ok?

I'm glad I figured out what the problem was but I want to know how to fix it correctly.

05-09-2011, 02:43 AM	#1
Socalgal Zilvia Member Join Date: Oct 2010 Location: LA Cali Age: 39 Posts: 197 Trader Rating: (12) Feedback Score: 12 reviews	Quick questing about getting power to my ecu. Someone experienced please chime in So my fucking "turn key swap" purched from a member here didn't work. It came with a s15 motor, harness wired for a s14, a power Fc, a stock ecu, a few other things but was of corse missing some of the very important things we had discussed. When the pallet arrived I noticed it was missing things and of corse the seller is not returning my calls. Because of this I figured I need to start testing everything. My main concern (other then the motor itself) was the PFC and harness. Got everything in and of corse the PFC won't power up with the key. The stock ecu does work but I do not have stock injectors or mafs. I had this same thing happen with my s13 sr when I first installed the power fc, after tons of work I ended up buying a wiring specialties (great option, just broke and need a damn car) So I went over the ecu harness and found that two of the normal power (labeled power as opposed to back up power) pins had nothing. All grounds had continuity. So I figured id put power to the two that was missing. I twisted those two together and jumped it to another of the main (non back up powers). Turned the key and the commander turned on. It was at this point I patted myself on the back and went back to the the turbo kit and all the crap I still have to do. Is it ok to leave it like that? I thought nothing of it at the time but now I'm wondering if these are supposed to see power from different sources or something. I mean there all gonna see it from the batt but If that was the case there would be just one source coming in and be distributed inside the ecu. So if there coming from different circuits or something and need to be fused differently then what I did isn't going to be a perminate fix. So is it ok? I'm glad I figured out what the problem was but I want to know how to fix it correctly.