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Old 06-12-2007, 08:30 PM   #1
cardshark
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Member#: 122792
Join Date: Aug 2006
Location: Ohio
Vehicle:
2005 Impreza WRX
Obsidian Black Pearl

Default Help finding Wiring Diagram for A/F gauge install

Looking to install A/F Ratio, Boost and Oil Temp gauges. I know I'm looking for pin B-17 on the ECU to connect signal wire from A/F gauge. Searching around (yes even on Scoopymods) having trouble finding a diagram or picture that can show me where it is. Maybe also any diagram or pic I may need for Oil Temp gauge install.

Thanks in advance...
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Old 06-12-2007, 11:14 PM   #2
rkramer
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if your A/F gauge connects to the ECU, take it back. the only wiring you want to tap into for A/F is ground, power, and light dimmer. narrowband a/f gauges connect to the stock o2 sensor, which is bad. it is useless for tuning, and worst case it could destroy your engine by affecting the o2 signals the ecu is receiving.

the other gauges, run the wires yourself. power, ground, dimmer are the only ones, and you can easily grab those from the clock &/or radio wires in the dash.
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Old 06-12-2007, 11:22 PM   #3
cardshark
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Obsidian Black Pearl

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Ok. I am hearing that advice from more than one source. So, if I buy an A/F Ratio gauge I want a Wide-Band? If so, do I need to install a different sensor for it? Where can I read on that?

Thanks
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Old 06-13-2007, 12:10 PM   #4
Sub2ner
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homework on narrow vs wideband is good
narrowband (what youve got) has its pros if you know what you want it for.
if you choose to use it:
purple wire goes to purplish wire from the rear 02 sensor
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Old 06-13-2007, 03:12 PM   #5
cardshark
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Obsidian Black Pearl

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Well I dont have anything yet so I free to do whatever. Thanks for the help. It sounds like Wide band is better, but my car is very mildly tuned.. To weld a new bung, buy a new sensor and buy a wideband gauge sounds like a chunk of change. I might just wait. A project for later.
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Old 08-09-2007, 07:25 AM   #6
Sub2ner
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if you are tuning, maybe checking things without datalogging, wideband is amazing.
however
if you are running something safe off the shelf (cobb map), have done mild things outside of the maps tune and want to see a/f while under wot and just listening for knock is nearly archaic, narrowband.
tis what i do
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Old 08-09-2007, 02:33 PM   #7
cardshark
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Obsidian Black Pearl

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Thanks for the tip. But at the expense and effort of gauges, a pod, installing the correct way, I may just not. I'm only going to do stg 2. Maybe a STI TMIC at best. Seems like a lot of extra work just to have cool lights to look at. If I ever swap out the turbo, I'll be all over it.
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