[V8] New O2 Sensor- Whhhhaaaatt

[George Tur]

On Saturday 15 July 2006 02:15, rudedog714 wrote:
> Here's a head scratcher, at least for me. I just replaced my O2 sensor,
> went with the 4 lead type. Now the thing is fine until it warms up the it
> seems to run too rich. Flat stretch of road at a steady 65 MPH should give
> me 25-28 MPG instead it's 15-17 MPG then it'll go back to normal for a bit
> and back to running too rich. I've double checked all the connections and
> the extra ground lead is on a bolt behind the drivers side head. What's
> going on here, I'm baffled. Thanks in advance for all the incredible Audi
> expertise, William _______________________________________________
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This probably doesn't apply in your case since it occurred right after 
replacing the O2 sensor.

But, last month my V8 died because of the MAS sensor, and prior to that I was 
getting mileage readings similar to yours where it would oscillate between a 
low and high mileage readings. I think you can dump codes for that, since 
that is what the shop I brought it to did in order to track the problem down. 
The part isn't cheap it's $600 from the dealer.

George Tur
91 V8