#iacv

[carssimplified]

How Idle Air Control Valves Work

[fultiltdrift-blog]

New video Up! Give it a look and let me know what you think in the comments.

https://www.youtube.com/channel/UC50qD4I2K4LncvtNXVF4rJQ

Trying to build a community where we can share knowledge.

Get the word out!

We are also on Instagram and Facebook!

[hackedecu]

New Post has been published on HackedECU.com

New Post has been published on http://www.hackedecu.com/1-wire-o2-sensor-to-4-wire-heated-o2-sensor-conversion-obd1

1 wire O2 sensor to 4 wire heated O2 sensor conversion. (OBD1)

1 wire to 4 wire O2 sensor:

Notes: You will need to have your ecu chipped to enable the o2 heater function, on stock maps they have it disabled.

O2 sensor loom colours arnt all the same iv seen a few different combinations already. Some with green instead of green/white. And some with just black instead of black/orange and black/yellow.

Car effected: (probably more but these are the only ones iv seen so far) EG8 d15b P08 vtec EG8 d15b P05 non-vtec EG8 d16a p27 non-vtec

Parts needed: 4 wire o2 sensor plug from loom. 4 wire o2 sensor Some wire (small case) SMT 2N4401 switching transistor. (large case) NTE2361 NPN switching transistor.

Tools needed: Solder Soldering iron Wire stripper heat shrink electrical tape

Method: ECU: (small case) First start by modifying your ecu to added the needed transistor. This is Q15 and it is on the rear of your ECU. Its a SMT 2N4401 switching transistor.

And installed

Now close the ecu back up.

(large case) First start by modifying your ecu to added the needed transistor. This is Q30 and it is on the top just under the number 5 in the center of your ECU. Its a NTE2361 NPN switching transistor.

And installed

Now close the ecu back up.

/ECU

Loom From now on its the same for small or large case. Now you need to add the 4 wire O2 sensor plug.

Pin-out for this is

[1][2] [3][4] 1 is green/white 2 is white 3 is black/orange 4 is black/yellow

O2 sensor side but loom side is the same.

All wires should be stripped then soldered and heat shrink wrapped. I also like to put some electrical tape over all the final wires and tape them up so they have extra protection.

[1] Now connect pin 1 green/white to one of the green/white wires at the following places. TPS or Intake Air Temp. They have the same circuit.

[2] Next connect pin2 the white to the 1 wire o2 sensors white wire.

[3] Now connect pin3 black/orange to pin A6 on the ECU, You will need to run a new wire into the car to connect it. Its the largest connector on the ecu.

[4] Finally connect pin4 black/yellow wire to one of the black/yellow wires at the following places. IACV, Fuel Injectors or EVAP Purge they share the same circuit.

/Loom

Iv plugged the 4 wire o2 sensor in to the stock position of the 1 wire sensor and had no problems so far. But I guess problems could arise from the added heat and it maybe better to change to a manifold that has the sensor in the lower position like the 4 wires ones come stock.

Ill add info for 7 wire wide-band o2 to 4 wire heated o2 sensor next week since ill be converting one of these in the weekend to get tuned next week. But it looks like its just a matter of cutting the 7 wire plug off and soldering on the 4 wire plug and changing the ecu to a supported one.

[bloodsweatandwastedyears-blog]

*me sitting on the computer..hear honda idle* : "I HEAR  A HONDA"

mom looks at me like i'm fucking insane

*runs to the door, sees a slammed cb7* : "CALLED IT"