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man I'm a little confused. I got a autometer air/fuel gauge, it has three wires 1. for the power 2. for ground and 3. to be connected to the signal wire on the oxygen sensor. Where can I find that #3 WIRE. WHAT NUMBER IS IT ON THE ECU. CAN ANYBODY SEND ME A PICTURE OR SOMETHING?
 

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EVO CAN EVO said:
man I'm a little confused. I got a autometer air/fuel gauge, it has three wires 1. for the power 2. for ground and 3. to be connected to the signal wire on the oxygen sensor. Where can I find that #3 WIRE. WHAT NUMBER IS IT ON THE ECU. CAN ANYBODY SEND ME A PICTURE OR SOMETHING?
Pin number 76 on the ECU is the front o2 sensor.

PIC courtesy of the FINE FOLKS AT ROAD RACE ENGINEERING!
 

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hey thanks that helped out alot. I hooked the violet#3 wire to the #76 on the ecu,is that how you do it? After I installed all wires the gauge was flickering red on idle and when I was driving ,it would bounce from left to right, is that correct?
 

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It should read lean and bounce around at idle, and will cycle back and forth around stoich when your cruising. The important part is that at wot it stays on the rich side. I'm not sure how rich the evo's run stock, but it's probably around 10.1 at wot.\

wot= wide open throttle, just in case.
 
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