The AUSubaru.com.au Forums

I bought a Air Fuel ratio Gauge off eBay last week and i installed it this arvo.



Red wire went to pin 19 (Ignition Power)
Grey wire went to pin 48 (O2 sensor)
Black wire went to ground

Easy as.

I have a new O2 sensor and when cruising, the leds sweep back and fords (from lean to rich) quicker than the eye can see. So obviously our ecus arent as slow as we thought.

The moment i put my foot down, it stops sweeping and only lights 1 or 2 leds. It gives you a really good idea of when the engine is in closed loop / open loop mode.

The only thing is that as i accelerate at WOT, as the engine nears 4k rpm, its leaning out. I will have to hook up a fuel pressure gauge and check my fuel pressures.

While im here, i'll show off my boost gauge that is recessed into the dash surround

on a side note what did your surging problem turn out to be?

dunno, ive still got it

But if its leaning out, then pinging, then retarding timing, that may be the cause of it

Time to break out the fuel pressure gauge

get me the link to that A/F guage

sweeping back and forth is what they shuld be doing yer when cruising.

i need to no if mines running rich lol

Both your boost gauge and your fuel ratio gauge is the exact same as mine.

Dave

Here is an ebay link to what i bought

52mm Autometer Air Fuel Ratio Gauge