I am going to hook up my Greddy a/f gauge. I was reading over the install directions and it says that I have to drill a hole in the exhaust manifold and install a sensor. But I thought I read some where that you could just tap of the Ecu or Utec in my case because that is what I am running. Can anyone tell which way to hook it up?

 

Here you go:

http://www.scoobymods.com/forums/sho...p?threadid=900

Just to let you know, an A/F guage is useless on a wrx.

 

Why do you say it is useless?

 

bump, same question

 

The ones that tap the ECU are useless because you have to tap the rear 02 sensor which is narrowband and not a true A/F sensor, and also it is too far downstream in the exhaust and after the cats. The front sensor is a wideband A/F sensor that can't be tapped into. So, if you tap the rear sensor the gauge readings will have little value aside from providing a light show.
The only accurate A/F gauges are the ones that use a separate, dedicated wideband sensor mounted in the manifold.

 

Yea, what Mulder said.

 

Thansk for clearing that up for me, that makes sense

 

I call that gauge the Happy Disco Party Light Gauge. Completely worthless, but fun to look at.

 

My gauge has a seperate sensor to hook up to the manifold so that should work correctly right?

 

hahhahahah, you could also call it a space filler

 

under full throttle it can give you an idea of your air/fuel but its not accurate. There is a wideband you can get for a decent price now, I think it was like 550 or so. I'll get back to you if I find it again

 

http://www.fastwrx.com/wio2sekit.html

found it

 

wow thats expensive...is it worth it?