k i have a general idea on how to hook up a autometer air/fuel(60 dollar one). i think i can hook that up to the o2 sensor by splicing into it. but which wire do i splice into? or if i wanted to hook it to the ecu, do i just find the o2 sensor wire in the harness and splice into that? like i said i have a general idea all help would greatly help me to not screw up the evo.tyl8r

 

k i finally found a pin out. so do i use the primary or secondary sensor?

 

I used the primary as to that one is before the cat for a more accurate reading....but with a narrowband...nothing is really accurate...lol

 

oh definately this was just a temporary guage setup. i just got the car so im just useing these to help with the tuneing abit more. thanks though i will use pri

 

k i just got my boost and a/f guage hooked up. boost guage is workin perfectly however i ran into a couple snags with the a/f.

1). all the pinouts i can find are for 03 evo. is there a difference between them?
2). i dont have a 76 primary(theres no wire ran to 76).?!?!?!
3). the guage stays on the far right side which is as rich as it gets, only thing i could think of was that i had it hooked to the wrong wire and it was gettin a constant supply of high volts. so i checked and since i dont have a pri i put it on the secondary(75), a pink wire.
4).know this may be stupid but im thinking of every possiblity. i have it hooked to the 20 amp windsheild wipers?

any ideas would help alot, ill keep reading opther ppls post to see if i cant dig something up


ps what color is the primary suppose to be

 

wouldnt u know it. i found the answer 5 mins after last post lol sry guys.