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Old 11-04-2002, 11:22 AM   #1
Scooby_Treat
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Member#: 20676
Join Date: Jun 2002
Default Help with APEX Auto TT

Help how do i hook up the APEX o2 sensor 2 the cars O2 sensor. and where do i ground APEX"s wire into the ECU so i can get the auto timer to work?????
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Old 11-04-2002, 01:19 PM   #2
BullsWRX
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Member#: 12097
Join Date: Nov 2001
Location: Rocky Mount, NC
Vehicle:
2003 Ford Mustang GT
Dark Shadow Grey

Default

its been a while.. but I'm 85% sure there were 2 wires for the rear o2 sensor. Those are the 2 I connected mine to for the A/F readings.

One of them is the ground. But the autotimer isn't going to work on our cars. We have a heated o2 sensor. Just set it to a default and go with it.
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Old 11-04-2002, 01:52 PM   #3
Scooby_Treat
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where are these wires located???
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Old 11-04-2002, 04:07 PM   #4
jfalcon001
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Member#: 23062
Join Date: Aug 2002
Location: Waltham, MA
Vehicle:
2002 Impreza WRX
Silver

Default WRX ECU Wiring Diagram

Here take a look at

http://www.northursalia.com/m...ng/wrxpin.html

This will show you the entire list of wires comming out of the ecu. It is very very helpful...
I also have the apexi TT and A/F gauge... i just wanted to mention to you that the A/F on it is going to be worthless if you connect it to the rear o2 sensor.... the air will have already gone through three cats. And since the front o2 sensor is wide band you can't connect to that at all. The only solution i have had to this problem is to install another new aftermarket o2 sensor. Otherwise the A/F should be trusted about as far as you can push you car up a hill on an icy new england road with the e-brake on.

Justin

PS.. i got alot from people on the board... i am sure if you search you can find some of my posts about this.
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