SR20DET redtop in an s14 previous owner mess - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

moose4130 · 11-29-2016, 12:28 PM

I recently purchased an s14 with a redtop sr20det swap done by a previous owner. It is running off of an s13 ecu with nistune, and I was told it has a wiring specialties harness in it. I have a quick question about the oxygen sensor wiring and harness location. I bought a skinny o2 sensor from enjuku, and I'm trying to get it wired in. The connector on the sensor is a three wire connector, a flat oval shape, but I am having trouble finding the harness connector to plug It in to. I'm not 100% sure if I have the right sensor connector. Can anyone give me a ballpark of where I should be looking or if I have the right sensor connector?

jedi03 · 11-29-2016, 02:45 PM

my connector is on the intake side of the motor

Kingtal0n · 11-29-2016, 05:20 PM

locate the pinout for the ECU. they are all over the internet, just search up whatever the cover of the ECU says on it.

Then do a continuity test, using a $5 multimeter from harbor freight.

The most important wire is the signal wire. Find this wire first so you can locate the plug.

Blk96t · 11-29-2016, 05:27 PM

On the specialties harness the lead is at the beginning of the wires that go to the tips,temp,Cas and maf. It will be by the firewall somewhere it about 1' long.
You could go to the wiring specialties website and follow their install guide.

moose4130 · 11-29-2016, 07:52 PM

The install instructions helped a little bit. I'm not sure which harness it is from them, but they seem very similar regarding the oxygen sensor. But, the ship that installed the harness didn't follow the directions very well, and the harness is tucked poorly. The instructions say the harness should run across the firewall zip tied to brake lines and the sensor connector should be pretty close to the coil pack sub harness. It's nowhere near it. The only free connectors are a four pin square connector where the IACV should be, and another similar one further away, neither have a white wire that comes from the ECU's o2 sensor pin. I may have to disconnect everything and redo it all.

11-29-2016, 12:28 PM	#1
moose4130 Join Date: Nov 2016 Location: Dayton Ohio Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	SR20DET redtop in an s14 previous owner mess I recently purchased an s14 with a redtop sr20det swap done by a previous owner. It is running off of an s13 ecu with nistune, and I was told it has a wiring specialties harness in it. I have a quick question about the oxygen sensor wiring and harness location. I bought a skinny o2 sensor from enjuku, and I'm trying to get it wired in. The connector on the sensor is a three wire connector, a flat oval shape, but I am having trouble finding the harness connector to plug It in to. I'm not 100% sure if I have the right sensor connector. Can anyone give me a ballpark of where I should be looking or if I have the right sensor connector?

11-29-2016, 05:20 PM	#3
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 41 Posts: 4,829 Trader Rating: (17) Feedback Score: 17 reviews	locate the pinout for the ECU. they are all over the internet, just search up whatever the cover of the ECU says on it. Then do a continuity test, using a $5 multimeter from harbor freight. The most important wire is the signal wire. Find this wire first so you can locate the plug. __________________ 5.3/4l80e/turbo 240sx playthrough: tinyurl.com/4l80er

11-29-2016, 02:45 PM	#2
jedi03 Nissanaholic! Join Date: Jul 2008 Location: albuquerque Posts: 1,837 Trader Rating: (8) Feedback Score: 8 reviews	my connector is on the intake side of the motor

11-29-2016, 05:27 PM	#4
Blk96t Leaky Injector Join Date: Mar 2013 Location: Sioux falls Age: 45 Posts: 52 Trader Rating: (0) Feedback Score: 0 reviews	On the specialties harness the lead is at the beginning of the wires that go to the tips,temp,Cas and maf. It will be by the firewall somewhere it about 1' long. You could go to the wiring specialties website and follow their install guide.

11-29-2016, 07:52 PM	#5
moose4130 Join Date: Nov 2016 Location: Dayton Ohio Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	The install instructions helped a little bit. I'm not sure which harness it is from them, but they seem very similar regarding the oxygen sensor. But, the ship that installed the harness didn't follow the directions very well, and the harness is tucked poorly. The instructions say the harness should run across the firewall zip tied to brake lines and the sensor connector should be pretty close to the coil pack sub harness. It's nowhere near it. The only free connectors are a four pin square connector where the IACV should be, and another similar one further away, neither have a white wire that comes from the ECU's o2 sensor pin. I may have to disconnect everything and redo it all.