SR wiring help please!!! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Gjohnson7 · 10-07-2007, 10:20 PM

Ok, I'm still working on my SR rebuild and now I'm on to wiring. My engine bay is painted to I am going to start dropping in the engine tomorrow. Here's the deal, this wiring came out of a car that had a running SR for 2 years, but the wiring was a complete hack job.

I've been soldering and wraping for a while now and this is what I have.

I think the ECU harness looks a lot better now with the exception of the O2 sensor, which is actually missing.

But here's the issue. I confused with the engine/ battery harness. What are these wires for and am I missing something?

Oh and I've been using these sites for the wiring http://www.frsport.com/sr20det-swap-...r20-p-665.html and http://www.heavythrottle.com/

Gjohnson7 · 10-08-2007, 10:48 AM

Anyone?????????????

*burnsauto* · 10-08-2007, 11:17 AM

could be one of the sensors on the tranny..its hard to tell from the pic.you may just want to mock it up, and see what you're missing..

Gjohnson7 · 10-29-2007, 10:40 PM

Ok, I'm almost there. The engine is in and I had an issue with timming which I think I have corrected now, but what is this wire???

Before when my timing was out of wack, I would try to start the engine and after a few cranks this wire would start smoking. Now, it has melted the black plastic connector, that attaches it to the firewall.

driftn_silvia · 10-30-2007, 01:42 AM

that i believe to be a ground wire.

kasokuracing · 10-30-2007, 04:50 AM

Yeah that is the ground wire. Same as on my Sr. If it is smoking you probubly have something causing it to get hot. See if any wires are exposed around it.

**How about a wiring diagram for the S13 with SR20DE. I am looking for one.

statik · 10-30-2007, 07:55 AM

you have grounding issues. If that ground is melting/getting hot its because you dont have enough grounds, everything is using that

projectRDM · 10-30-2007, 08:52 AM

Exactly. There should be a large 4gauge wire that bolts to the plenum.

Gjohnson7 · 10-30-2007, 12:45 PM

Quote:

Originally Posted by statik

you have grounding issues. If that ground is melting/getting hot its because you dont have enough grounds, everything is using that

Quote:

Originally Posted by R240NA

Exactly. There should be a large 4gauge wire that bolts to the plenum.

Ok, that's what I was starting to think too! I will do some searching tonight and see what I can find. Thanks

Oh, and considering this is melted now, should I replace it with just another wire or something. It doesn't have to be that exact plastic connector, right???

projectRDM · 10-30-2007, 02:00 PM

It's just a female spade, cut it off or make a new piece of wire.

In reality, if you've got a good ground from the chassis to the block/head you don't even need that little ground, but I'd keep it and maybe bolt it to the firewall and the back of the head for a cleaner look.

Gjohnson7 · 11-01-2007, 10:32 PM

Quote:

Originally Posted by R240NA

Exactly. There should be a large 4gauge wire that bolts to the plenum.

Well, I made it to Lowes today and picked up some 4 gauge wire and made my own ground. ANd then guess what??

I got her started today!!!!

I haven't let her idle to long, yet since it was getting late but she does run. Seems like I have some ticking coming from the intake lifter on cylinder 1. Not sure if it will go away by it's self or if I need to pull it and bleed it.

I also have a lot of smoke at the moment, which I assume will burn off. I haven't let the car idle for longer that 10 seconds because my exhaust wasn't connected, just the down pipe.

I will need to do some tweaking, because the engine starts right up, but doesn't idle smoothly.

zaneithan · 11-02-2007, 11:33 AM

check vacuum, check timing, the crap will most likely burn off (if its the first time starting a fresh swap) mine pissed black crap and some other colored smoke for about an hour or two i think?, get a new set of plugs (or two) as the ones in there will probably be fouled (if not already) from all the crap its freshly cleaning out, check ALL bolts as far as vacuum goes (all clamps should be double checked, all hoses)

Gjohnson7 · 11-02-2007, 09:12 PM

Alright, I uploaded a quick video so you guys could see what she runs like. Like I said before I think my lifter on cylinder 1 needs to be bleed. And I'll be picking up some gauges so I will be able to let her run longer and know what's going on.

[ame]http://www.youtube.com/watch?v=UQDrEuL0am8[/ame]

This is the longest I've ran the engine, because I don't have a oil pressure gauge or temp gauge and I don't want to run the engine blindly.

Gjohnson7 · 11-04-2007, 07:28 AM

Ok, a little help guys. I was talking to my neighbor about running my engine without oil pressure and he let me borrow a oil pressure gauge he had laying around. So, I am planning on hooking up this gauge later on today and running the engine and I found the location of the oil pressure sensor. But since this is my first time and I'm really a noob to all this stuff. Do, I need to drain the oil before I pull this sensor? I know its attached to the block and the last thing I need is oil all over my garage floor. Thanks

Oh, and I finally found my O2 sensor plug, so now I can solder it back on to the engine harness.

armand · 11-04-2007, 07:56 AM

no you will not have to drain the oil, when you pull out the sensor a little will come out but not much,

Gjohnson7 · 11-07-2007, 09:07 AM

Alright, I finally got the gauge connected and I've let the engine run a little to stop the smoking.

But here's the new issue. I found my O2 sensor plug and it was connected to the O2 sensor. I soldered the wires back into the harness, but this O2 sensor doesn't fit. The sensor is to large for the hole on the top of the exhaust manifold and it is too small for the hole on the Turbo elbow. Am I missing something. Do I have to buy a different O2 sensor for the swap?

Also, I have another question and I have tried searching and haven't come up with a lot and I'm currently at work so I can't do any searching at the moment. My Hatch had a SOHC gauge cluster in it and I swapped in the DOHC this weekend. The SOHC cluster didn't work of course, but I didn't have any other issues. After swapping the DOHC cluster in the time display blinks constantly when power accessory power is turn on and you can hear the H/L down relay in the engine bay clicking along with it. What would cause this? Does anyone have a write up on this swap so I can checking to see if something needs to be wired differntly? The cluster plugged right in, so I did not mess with the wiring. Thanks

11-07-2007, 09:16 AM

sounds like you have a black top o2 sensor (fat) and you need a redtop o2 sensor(skinny)

ecuastyle84 · 11-07-2007, 09:17 AM

do you have the stock turbo elbow? or is it aftermarket

the dohc plugs right in...i had the same issue last week bout the time display blinking...turn out to be a fuse...check that or the relay...if nothing then it might be a bad cluster...was it working before the swap?

ecuastyle84 · 11-07-2007, 09:18 AM

Quote:

Originally Posted by staticx1134

sounds like you have a black top o2 sensor (fat) and you need a redtop o2 sensor(skinny)

^^^
oh yea that can another thing too

Gjohnson7 · 11-07-2007, 10:09 AM

Quote:

Originally Posted by staticx1134

sounds like you have a black top o2 sensor (fat) and you need a redtop o2 sensor(skinny)

That would explain it. Hmmmmm

Quote:

Originally Posted by ecuastyle84

do you have the stock turbo elbow? or is it aftermarket

the dohc plugs right in...i had the same issue last week bout the time display blinking...turn out to be a fuse...check that or the relay...if nothing then it might be a bad cluster...was it working before the swap?

The Turbo elbow is aftermarket. It is some generic brand, but it looks identical to the Megan Racing one that is 2 3/4 ".

The SOHC cluster didn't work, but the time display was fine. I'm not sure if the DOHC cluster worked, it came off of my buddies parts car. Right now, it's doing the blinking thing and none of the gauges are working. No tach, speed or temp. I haven't noticed if the gas gauge is working.

ecuastyle84 · 11-07-2007, 11:05 AM

if its a megan elbow, thats what i have and i had to buy a different o2...i got a generic fat o2 sensor, 3 wire heated from heavythrottle.com

11-07-2007, 11:06 AM

nevermind...

Gjohnson7 · 11-07-2007, 05:24 PM

Any ideas on the cluster issue????

Gjohnson7 · 11-07-2007, 05:28 PM

ecuastyle84, do your remember which fuse it was? I immediatedly thought the H/L down relay was for the Headlights. But my headlights aren't even on the car right now, so I'm not sure what that would be an issue. Maybe I have a short somewhere with the headlights, but that still doesn't explain why it didn't do this with the sohc cluster.

Gjohnson7 · 11-08-2007, 09:04 PM

Ok, I need some more help. Of course this is a redtop swap, but I want to make sure I am running the write ECU. Every since I installed my new DOHC cluster my check engine light has been on. So here's the deal. I have 2 ECU's that came with my swap. My spare ECU has a big 62 on it and the code # below it is 23710 50F00 then A11-000-g90

The ECU I have installed has the half the label cut off so all I have the the code. It's 23710 50F10 and A11-000-g91. What ECU is this? Is it the stock SOHC?

zaneithan · 11-08-2007, 09:06 PM

ecu #62 is the right one for redtop sr20det...make sure when you plug it in, it is plugged in ALL THE WAY, not loose, it can cause problems if its loose.....but dont overtighten it so much that you break it

Gjohnson7 · 11-08-2007, 09:57 PM

Ok, here's another question that's got me confused. This harness was in a running Sr for 2 years but this doesn't look right compared to some of the wiring websites I've seen. Should there be 2 of these white connectors here or 1. I can only find 1 plug to connect this into.

zaneithan · 11-08-2007, 10:19 PM

your harness is really strange, are you sure it came from an sr?

Gjohnson7 · 11-09-2007, 06:03 AM

I'm pretty sure, but I wasn't the one that picked it up originally. I compared it to the instructions on some of the wiring websits posted above and it looked correct. Currently, my engine is running, but my check engine light is on and the dash isn't working.

Anyone else??? Should I have 2 white connectors or 1?

11-09-2007, 06:44 AM

lol i wish i realized this before,all u need to do is take the sr harness cut off the white plug and swap it out with the one from the ka...you dont need both.

10-07-2007, 10:20 PM	#1
Gjohnson7 Zilvia Addict Join Date: Mar 2004 Location: Broken Arrow, OK Age: 40 Posts: 980 Trader Rating: (7) Feedback Score: 7 reviews	SR wiring help please!!! Ok, I'm still working on my SR rebuild and now I'm on to wiring. My engine bay is painted to I am going to start dropping in the engine tomorrow. Here's the deal, this wiring came out of a car that had a running SR for 2 years, but the wiring was a complete hack job. I've been soldering and wraping for a while now and this is what I have. I think the ECU harness looks a lot better now with the exception of the O2 sensor, which is actually missing. But here's the issue. I confused with the engine/ battery harness. What are these wires for and am I missing something? Oh and I've been using these sites for the wiring http://www.frsport.com/sr20det-swap-...r20-p-665.html and http://www.heavythrottle.com/ __________________ LSX Kouki Project, swap completed in Dec 09

10-08-2007, 10:48 AM	#2
Gjohnson7 Zilvia Addict Join Date: Mar 2004 Location: Broken Arrow, OK Age: 40 Posts: 980 Trader Rating: (7) Feedback Score: 7 reviews	Anyone????????????? __________________ LSX Kouki Project, swap completed in Dec 09

10-08-2007, 11:17 AM	#3
burnsauto Premium Member Join Date: Dec 2006 Location: 717, PA Age: 35 Posts: 3,153 Trader Rating: (5) Rides Gallery: burnsauto Feedback Score: 5 reviews	could be one of the sensors on the tranny..its hard to tell from the pic.you may just want to mock it up, and see what you're missing.. __________________

10-29-2007, 10:40 PM	#4
Gjohnson7 Zilvia Addict Join Date: Mar 2004 Location: Broken Arrow, OK Age: 40 Posts: 980 Trader Rating: (7) Feedback Score: 7 reviews	Ok, I'm almost there. The engine is in and I had an issue with timming which I think I have corrected now, but what is this wire??? Before when my timing was out of wack, I would try to start the engine and after a few cranks this wire would start smoking. Now, it has melted the black plastic connector, that attaches it to the firewall. __________________ LSX Kouki Project, swap completed in Dec 09

10-30-2007, 07:55 AM	#7
statik Zilvia FREAK! Join Date: Oct 2003 Location: Long Island, NY Age: 37 Posts: 1,358 Trader Rating: (0) Rides Gallery: statik Feedback Score: 0 reviews	you have grounding issues. If that ground is melting/getting hot its because you dont have enough grounds, everything is using that __________________ 97 240sx esaarr \| Current Status: SOLD

10-30-2007, 01:42 AM	#5
driftn_silvia Zilvia Junkie Join Date: Jul 2005 Location: ventura Posts: 560 Trader Rating: (7) Feedback Score: 7 reviews	that i believe to be a ground wire.

10-30-2007, 04:50 AM	#6
kasokuracing Join Date: Dec 2006 Location: Tokyo Posts: 30 Trader Rating: (0) Feedback Score: 0 reviews	Yeah that is the ground wire. Same as on my Sr. If it is smoking you probubly have something causing it to get hot. See if any wires are exposed around it. **How about a wiring diagram for the S13 with SR20DE. I am looking for one. __________________ 　加　速

10-30-2007, 08:52 AM	#8
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 47 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	Exactly. There should be a large 4gauge wire that bolts to the plenum. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

10-30-2007, 02:00 PM	#10
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 47 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	It's just a female spade, cut it off or make a new piece of wire. In reality, if you've got a good ground from the chassis to the block/head you don't even need that little ground, but I'd keep it and maybe bolt it to the firewall and the back of the head for a cleaner look. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

11-02-2007, 11:33 AM	#12
zaneithan Zilvia Addict Join Date: Sep 2003 Location: NY Age: 36 Posts: 948 Trader Rating: (10) Feedback Score: 10 reviews	check vacuum, check timing, the crap will most likely burn off (if its the first time starting a fresh swap) mine pissed black crap and some other colored smoke for about an hour or two i think?, get a new set of plugs (or two) as the ones in there will probably be fouled (if not already) from all the crap its freshly cleaning out, check ALL bolts as far as vacuum goes (all clamps should be double checked, all hoses) __________________ 1993 240sx fastback (wrecked) 1991 240sx SE fastback Daily Driver status 1992 240sx fastback (???) 1986 Toyota Corolla SR5 Coupe (sold)

11-02-2007, 09:12 PM	#13
Gjohnson7 Zilvia Addict Join Date: Mar 2004 Location: Broken Arrow, OK Age: 40 Posts: 980 Trader Rating: (7) Feedback Score: 7 reviews	Alright, I uploaded a quick video so you guys could see what she runs like. Like I said before I think my lifter on cylinder 1 needs to be bleed. And I'll be picking up some gauges so I will be able to let her run longer and know what's going on. [ame]http://www.youtube.com/watch?v=UQDrEuL0am8[/ame] This is the longest I've ran the engine, because I don't have a oil pressure gauge or temp gauge and I don't want to run the engine blindly. __________________ LSX Kouki Project, swap completed in Dec 09

11-04-2007, 07:28 AM	#14
Gjohnson7 Zilvia Addict Join Date: Mar 2004 Location: Broken Arrow, OK Age: 40 Posts: 980 Trader Rating: (7) Feedback Score: 7 reviews	Ok, a little help guys. I was talking to my neighbor about running my engine without oil pressure and he let me borrow a oil pressure gauge he had laying around. So, I am planning on hooking up this gauge later on today and running the engine and I found the location of the oil pressure sensor. But since this is my first time and I'm really a noob to all this stuff. Do, I need to drain the oil before I pull this sensor? I know its attached to the block and the last thing I need is oil all over my garage floor. Thanks Oh, and I finally found my O2 sensor plug, so now I can solder it back on to the engine harness. __________________ LSX Kouki Project, swap completed in Dec 09

11-04-2007, 07:56 AM	#15
armand Zilvia Member Join Date: May 2003 Location: barbourville kentucky Age: 44 Posts: 262 Trader Rating: (8) Rides Gallery: armand Feedback Score: 8 reviews	no you will not have to drain the oil, when you pull out the sensor a little will come out but not much,

11-07-2007, 09:07 AM	#16
Gjohnson7 Zilvia Addict Join Date: Mar 2004 Location: Broken Arrow, OK Age: 40 Posts: 980 Trader Rating: (7) Feedback Score: 7 reviews	Alright, I finally got the gauge connected and I've let the engine run a little to stop the smoking. But here's the new issue. I found my O2 sensor plug and it was connected to the O2 sensor. I soldered the wires back into the harness, but this O2 sensor doesn't fit. The sensor is to large for the hole on the top of the exhaust manifold and it is too small for the hole on the Turbo elbow. Am I missing something. Do I have to buy a different O2 sensor for the swap? Also, I have another question and I have tried searching and haven't come up with a lot and I'm currently at work so I can't do any searching at the moment. My Hatch had a SOHC gauge cluster in it and I swapped in the DOHC this weekend. The SOHC cluster didn't work of course, but I didn't have any other issues. After swapping the DOHC cluster in the time display blinks constantly when power accessory power is turn on and you can hear the H/L down relay in the engine bay clicking along with it. What would cause this? Does anyone have a write up on this swap so I can checking to see if something needs to be wired differntly? The cluster plugged right in, so I did not mess with the wiring. Thanks __________________ LSX Kouki Project, swap completed in Dec 09

11-07-2007, 09:16 AM	#17
used240sxparts Guest Posts: n/a	sounds like you have a black top o2 sensor (fat) and you need a redtop o2 sensor(skinny)

11-07-2007, 09:17 AM	#18
ecuastyle84 Zilvia Junkie Join Date: Mar 2005 Location: New Jersey Posts: 552 Trader Rating: (1) Rides Gallery: ecuastyle84 Feedback Score: 1 reviews	do you have the stock turbo elbow? or is it aftermarket the dohc plugs right in...i had the same issue last week bout the time display blinking...turn out to be a fuse...check that or the relay...if nothing then it might be a bad cluster...was it working before the swap? __________________ *FS: S13 FULL PARTOUT...LOTS OF GOODIES!!!*

11-07-2007, 11:05 AM	#21
ecuastyle84 Zilvia Junkie Join Date: Mar 2005 Location: New Jersey Posts: 552 Trader Rating: (1) Rides Gallery: ecuastyle84 Feedback Score: 1 reviews	if its a megan elbow, thats what i have and i had to buy a different o2...i got a generic fat o2 sensor, 3 wire heated from heavythrottle.com __________________ *FS: S13 FULL PARTOUT...LOTS OF GOODIES!!!*

11-07-2007, 11:06 AM	#22
used240sxparts Guest Posts: n/a	nevermind... Last edited by used240sxparts; 11-07-2007 at 11:11 AM.. Reason: nevremind

11-07-2007, 05:24 PM	#23
Gjohnson7 Zilvia Addict Join Date: Mar 2004 Location: Broken Arrow, OK Age: 40 Posts: 980 Trader Rating: (7) Feedback Score: 7 reviews	Any ideas on the cluster issue???? __________________ LSX Kouki Project, swap completed in Dec 09

11-07-2007, 05:28 PM	#24
Gjohnson7 Zilvia Addict Join Date: Mar 2004 Location: Broken Arrow, OK Age: 40 Posts: 980 Trader Rating: (7) Feedback Score: 7 reviews	ecuastyle84, do your remember which fuse it was? I immediatedly thought the H/L down relay was for the Headlights. But my headlights aren't even on the car right now, so I'm not sure what that would be an issue. Maybe I have a short somewhere with the headlights, but that still doesn't explain why it didn't do this with the sohc cluster. __________________ LSX Kouki Project, swap completed in Dec 09

11-08-2007, 09:04 PM	#25
Gjohnson7 Zilvia Addict Join Date: Mar 2004 Location: Broken Arrow, OK Age: 40 Posts: 980 Trader Rating: (7) Feedback Score: 7 reviews	Ok, I need some more help. Of course this is a redtop swap, but I want to make sure I am running the write ECU. Every since I installed my new DOHC cluster my check engine light has been on. So here's the deal. I have 2 ECU's that came with my swap. My spare ECU has a big 62 on it and the code # below it is 23710 50F00 then A11-000-g90 The ECU I have installed has the half the label cut off so all I have the the code. It's 23710 50F10 and A11-000-g91. What ECU is this? Is it the stock SOHC? __________________ LSX Kouki Project, swap completed in Dec 09

11-08-2007, 09:06 PM	#26
zaneithan Zilvia Addict Join Date: Sep 2003 Location: NY Age: 36 Posts: 948 Trader Rating: (10) Feedback Score: 10 reviews	ecu #62 is the right one for redtop sr20det...make sure when you plug it in, it is plugged in ALL THE WAY, not loose, it can cause problems if its loose.....but dont overtighten it so much that you break it __________________ 1993 240sx fastback (wrecked) 1991 240sx SE fastback Daily Driver status 1992 240sx fastback (???) 1986 Toyota Corolla SR5 Coupe (sold)

11-08-2007, 09:57 PM	#27
Gjohnson7 Zilvia Addict Join Date: Mar 2004 Location: Broken Arrow, OK Age: 40 Posts: 980 Trader Rating: (7) Feedback Score: 7 reviews	Ok, here's another question that's got me confused. This harness was in a running Sr for 2 years but this doesn't look right compared to some of the wiring websites I've seen. Should there be 2 of these white connectors here or 1. I can only find 1 plug to connect this into. __________________ LSX Kouki Project, swap completed in Dec 09

11-08-2007, 10:19 PM	#28
zaneithan Zilvia Addict Join Date: Sep 2003 Location: NY Age: 36 Posts: 948 Trader Rating: (10) Feedback Score: 10 reviews	your harness is really strange, are you sure it came from an sr? __________________ 1993 240sx fastback (wrecked) 1991 240sx SE fastback Daily Driver status 1992 240sx fastback (???) 1986 Toyota Corolla SR5 Coupe (sold)

11-09-2007, 06:03 AM	#29
Gjohnson7 Zilvia Addict Join Date: Mar 2004 Location: Broken Arrow, OK Age: 40 Posts: 980 Trader Rating: (7) Feedback Score: 7 reviews	I'm pretty sure, but I wasn't the one that picked it up originally. I compared it to the instructions on some of the wiring websits posted above and it looked correct. Currently, my engine is running, but my check engine light is on and the dash isn't working. Anyone else??? Should I have 2 white connectors or 1? __________________ LSX Kouki Project, swap completed in Dec 09

11-09-2007, 06:44 AM	#30
used240sxparts Guest Posts: n/a	lol i wish i realized this before,all u need to do is take the sr harness cut off the white plug and swap it out with the one from the ka...you dont need both.

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