Car running rich - smells of fuel while idelling. Any ideas?

[Fluellen]

Yes, looks like neither of the O2s is working. Even at idle your scan tool should report switching voltage; e.g. the O2 voltage should sweep between approx. 0.2V and 0.8V. O2 sensor output is not a percentage, it's a voltage between 0 and 1V.

So yes, something didn't go right when the O2s were changed...

[Paul Whyte]

Many thanks Fluellen,

Great, clear concise information, I shall tuck the car away as I am away this weekend, but shall work on it Monday as I have next week off work.

Hopefully all will be fine after i re-wire the sensors. fingers crossed.

[Fluellen]

You're welcome! Hope it works out!

[Paul Whyte]

hi,

I am half way through replacing the sensors, will continue with the other tomorrow morning, I am wondering if the car stays in open loop, could the air sensor be to blame?

If so, can someone tel me where it is , how easy it s to replace and importantly would this working incorrectly make the car run rich and in open loop?

Many thanks

Paul