Strage Air/Fuel Gauge Readings...

[Dave Hord]

Hey all,

Installed an Auto Meter Air/Fuel Mixture gauge in the 90q this weekend.
Installed as one more place to look if it starts to run funny...well, that and
it was a christmas present so I might as well USE it!

Stock 1989 NG 10v engine.

Wired it up to the actual O2 sensor wiring, as opposed to right before the ECU
that I know is popular.

Heres what I get:

1) When just cruising it bounces between 'half-lean' and all the stoich LED's.
I know bouncing is normal, but EVERY gauge I've ever seen bounces between full
lean and full rich.

2) Under WOT I get maximum 2 LED's rich.  Haven't seen anything more.

Now, this tells me one of three things:

1) Gauge not working/not wired properly.
2) Fuel mixture is set too lean
3) I have the most accurate Audi ECU ever created!?!

Perhaps this explains my 10L/100km mileage during these winter months!?!

I should note I've never experienced any pinging or anything else that would
suggest a problem...well, besides my slight miss occasionally when the engine
gets really wet, which I've always attributed to moisture getting in somewhere.

Am I okay?  Or do I need to do a full bentley-procedure mixture check?

-Dave


---------------------------------------------------
89 90q  330,000km as of Feb 26th.
Rally Conversion...perpetually in progress...
Roll cage shots available at:
http://home.the-wire.com/~spokes/rollcage/page1.htm