cardelino18

iTrader: (3)

ok so i bought a triple gauge pillar and it came with a A/F gauge the only has 3 cables... black(ground) Red(+) and purple... i know the purple has to be tapped to one of the cables on the OBDII port... but which one would it be???

Thanks!

PS: ive always wanted to get a wideband but im broke right now so ill install this for now

BLAZIN07SS

iTrader: (7)

thats a narrowband bro. you have a factory wideband too, just get an interceptor so you can see your AF

cardelino18

iTrader: (3)

i have the dashhack that tells me the A/F... i just want to install this one for now so the gauges actually work...

Stamina

If black is ground and red is positive, then the purple one would go to the tapped narrowband sensor, which you don't have. You can't just tap it into the OBDII, because that data is digital, and it would have to have some sort of logic in it to pull the sensor information off the LAN. Or you would need to mount a narrowband O2 in your downpipe before the cat.

You've got a stock narrowband after where the cat normally is, but tapping that wire may skew the reading that the ECU reads because it may change the voltage characteristics of the signal. It would therefore not be accurate and either pop a CEL and/or cause an emissions fault, thinking something's up with the cat. Being that the stock narrowband is behind the cat, it would also not be accurate to begin with. So I wouldn't go that route... just saying.

Your options:
1) Stick to the stock wideband and pulling the reading off of the LAN.
2) Tap a narrowband O2 in the downpipe before the cat.

Does this have some sort of LAN reading ability?

cardelino18

iTrader: (3)

ok how would i do option 1?

Stamina

Well:

You could stick to the Dashhawk/Dashdaq/Interceptor/RPD option.

or

If your gauge is able to read the GMLAN, then you could wire it into the OBDII. Since it only has one wire, I advise caution with this option because GMLAN requires two wires, so it may not work and in the worst case, your car won't start because everything is wired in series and everything on the LAN couldn't talk to each other.

When I installed my buddies RPD, we had to have two wires to let it interface with the GMLAN properly (and those were split, so it really ended up being 4 wires), so if your gauge has one, I'm not sure how that'd work.

tomj77

iTrader: (2)

throw it away and get a real guage

XXL

Isn't the rear O2 narrow band?

peachpuff

Yes it is, you can connect the a/f gauge there if you just want it to work... won't tell you much though.

XXL

Thanks for the clarification, peachpuff.

All, instead of berating the guy for his gauge choice, we have an answer to his request... connect it to the signal lead coming off the rear O2. He already states in his OP that he'd rather than wideband info, but this is what he has to work with for now.

/puts on flamesuit for obligatory "flame the guy who's asking for civility" blast

tomj77

iTrader: (2)

well i gave my advice, iv had a narrow band, its a big pain in the ass at night.