Autogage - Air/Fuel ratio meter - where is the sender?

[Guest]

Anyhone know where the sender is to connect the autogage air/fuel ratio meter, (Not the air flow sender), there is a sender just above the cat, but I don't think it is that either.. I am lost :

[wrx_lou]

My understanding was tap the wire into the O2 sensor. just run it down to the ecu and tap it into the wire coming outta that.

[Guest]

Cheers.. just need a pinout diagram for a 9H ECU now (BG5B5CP)

[Koom]

 ROAMERNZ said:

Cheers.. just need a pinout diagram for a 9H ECU now (BG5B5CP)

Most of the pin's on a BG5B ECU are the same as V3/4 STI. Easier to find those on the net, if not, PM me your normal email address and I'll send you a pdf of the BG5B pinouts.

Also replied in Reubens ECU for sale thread.

Its pin B5 on his diagrams that you're after.

[Guest]

how accurete is the autogauge brand, or any gauge that monitors air/fuel ratio for that matter.

I'v lifted the boost a bit on my car and im just a little bit worried on what the ratios might be, and i find it hard to go get it checked out on a dyno for $200+.

[Koom]

If they are just taking their signal from the factory narrowband O2 sensor, then they're not going to be much use for tuning. Will basically only show you when they have crossed the stoichometric point.

The tuners will be using a wideband O2 sensor for checking which will tell you exactly what the air/fuel ratio is at any given point.