UrS6 - Want to increase your mpg ?

[macspring]

While reading other member's posts about their mpg / range per tank for UrS6 and S2s, my results were always much lower.

Thought I'd check my lambda probe on my 97 UrS6 as it may need to be replaced as presumably it is a few years old.

Mine turned out to be the original. 1997.

Bought a new Bosch probe, fitted it in a few minutes, easy on a C4.

My mileage / range per tank has increased. Can't say the exact amount, but payback should easily be within six tank refills.

My car seems to drive smoother in that it has less of a sudden transition between the time before boost, 3k, and on boost. No verifiable evidence, but just my seat of the pants feeling.

I'm not sure what the recommended frequency is for replacing a probe, but while you may be changing loads of other bits on your car, I'm suggesting your don't forget to check / replace your car's probe.

Won't do any harm.

Regards.

[UrS4boy]

G39 Lambda Oxygen (O2) Sensor Info and Function with PNs

G39 Lambda Oxygen (O2) Sensor Info and Function with PNs

http://forums.quattroworld.com/s4s6/msgs/21012.phtml

From http://members.shaw.ca/speedtek/UrS%...ice%20Map.html (click on the labels)

[popdemonic]

All urs4/s6 in Thailand got 5-6km/l normally.

[geneandbolly]

thanks for that wee pointer, MacS

anybody know the life expectancy of one of these probes?

[Thecrispynoodle]

thanks for that wee pointer, MacS

anybody know the life expectancy of one of these probes?

Bosch state 60,000 miles however my last one started throwing DTCs after only 21,000

[hunker7]

I changed mine with a very low mileage one and didn't see any improvements But glad it worked for you

[Thecrispynoodle]

The O2 is arguably the most important sensor on the engine, it's the only one with the ability to 'correct' erroneous behaviour from other sensors and components e.g. MAF, FPR, fuel pump etc. It also has the 'final word' on your AFR and your cats won't last long if it goes awol. Considering they can be picked up for as little as £55 these days we should probably be changing (or at the very least inspecting) them as a matter of routine a lot more often than every 60k and well before they fail on you.