SR20 Wiring Harness Trouble

[scribbles6]

I'm posting this on behalf of a friend, he's got an s13 with a black top sr20 in it, he has a split harness to fit correctly, you know the whole deal.
His problem is that he cannot get his timing right because there's no communication with the ECU (as it was diagnosed) he needs help, and i was wondering if this has happened to anyone here and if it has do you know how to fix it or do you know who can, he was telling me that Yuri made the harness for him, and i found that a lot of people complain about how he sucks and all, my friend tried contacting him about the problem and he would not stand behind his work so now we are screwed, he's been trying to get the car running for about 4 months now with no success.

Please help! anything will be greatfully appreciated, we just want to get his baby running again...

[bongnak]

here try this... 4 months is way too long.

open up the harness and fix it yourself. dont worry after you take like eh an hour looking at the schematics you'll get the big picture and it will look a lot less elaborate




this will def help

[scribbles6]

thanks, i'll give it a try and let you know how it works.

[Yuri]

Just in case anyone is wondering, that Yuri and I are not the same person.

[HalveBlue]

Check to make sure all the connections to your ECU are correct.

It might just be a bad ECU. The best and easiest to check that is to take a working ECU (if you can find one) and plug it in.

Good luck!

[g6civcx]

Originally Posted by HalveBlue

Check to make sure all the connections to your ECU are correct.

It might just be a bad ECU. The best and easiest to check that is to take a working ECU (if you can find one) and plug it in.

Good luck!

Oh no, this is not the right way to test an ECU. Never put a known-good ECU into a car with questionable wiring. You are risking damage to the good ECU.

A local shop did this to my good ECU without asking me first and I was very upset at them.


The best way is to find a car with a good ECU and good wiring. Then take your questionable ECU and plug it into that car. This way, you can test the ECU on a good car. Much less damage can be done this way.


Let's go through it logically.

Your wiring may be good or bad.
Your ECU may be good or bad.

If you stick a known good ECU into your wiring:
a) if your wiring is good the car will run. Then you know your ECU was bad.
b) if your wiring is bad the car will not run. You still do not know if your ECU was bad or good.

The risk with b) is that it can fry your ECU if you have a bad ground and/or bad wiring.

It's much better to take your questionable ECU and stick it into a good car with good ECU and wiring.

[broken240sx]

look to the wires going from the ignitor chip to the ECU, I had the same problem, 2 wires needed to be switched. extremely frustrating, but you'll be OK if you follow that diagram.

Wiring specialties sucks. I had the same problem plus when the car started it wouldn't turn off. also a crossed wire in the harness. I wish I just did it myself.

[HalveBlue]

I stand corrected.

Go with what G6 posted. It's a much safer way to do it.

[steve shadows]

Originally Posted by Yuri

Just in case anyone is wondering, that Yuri and I are not the same person.

duh hes in ny

[papi13]

try frsport.com/sr bro