ECU has no power after swap

General discussion forum about the 240sx, and a great place to introduce yourself to the board!
240dx
Posts: 344
Joined: Thu Jan 29, 2009 10:35 am
Car: '97 Nissan 240SX LE

Post

I just swapped in a kouki s14 SR20det into my 1997 240sx, The motor will turn over but has no spark or fuel.
I found the ecu has no power, all grounds have been tested and are well. Where does the ECU source power from the battery and ignition? Is there anything I should check first?


240dx
Posts: 344
Joined: Thu Jan 29, 2009 10:35 am
Car: '97 Nissan 240SX LE

Post

Its most likely something very simpl but i just cant figure it out. Why does my ECU not get power?? :facepalm2

Hoffman5982
Posts: 1805
Joined: Sat Sep 29, 2007 7:20 pm
Car: '95 sr20det 240sx

Post

click my build thread in my sig. I have a diagram of how I wired my dash harness up. I tried 2 other diagrams before making my own, and I didn't get power to the ecu with either of them. I wired it myself, and it got power fine.Im having the same problem, except mine ran for a while, and since then it just turns over. My ecu gets power and everything, I just don't know whats causing it not to start.

User avatar
mikecef2
Posts: 146
Joined: Tue Jun 12, 2007 7:15 am
Car: 90' Nissan 240sx (SR20det)

Post

Make sure you crack the case of the ecu on a clean table of course and check out the pin outs on the inside to the circuit board. It sounds like a similar problem I had and I found that the main ignition power line, fuel pump line, and ignitor line were fried on the circuit board.


Return to “240sx General Discussion”