Lambda sensors??????????????????????????

[Nick P]

I saw a thread on here recently where someone changed the lambda sensors and it cured poor mpg, lumpiness and improved perfomance....have many people gone down this route? I am wondering whether to try this as my mpg is quite poor and the fumes are very acrid/fuel smelling when reversing into the garage, also it can be lumpy at lower revs......

[Hut49]

Easy to get the lambda sensors checked - replacing them because someone else says this sorted their (perhaps) different problem seems an expensive way to go about fixing yours. If you're using Optimax then the exhaust does pong a bit especially when the engine's cold. Sounds like you should think about getting some diagnostics done first and then decide what needs replacing, cleaning. I'm sure this would be a more cost-effective route to smooth running.

[jonywishbone]

Try this link to test if they are working properly. The engine has to be hot before they start switching voltages.

www.ntksensors.co.uk/

[Nick P]

jonywishbone said:

Try this link to test if they are working properly. The engine has to be hot before they start switching voltages. www.ntksensors.co.uk/

thanks

[philr]

It was I.

I changed my sensors because this was the advice from a dealer after it had been put on their diagnosis equipment.
It has made the car run much more smoothly, but the MPG has only improved a little bit so far. Maybe once I've given it a few long runs for the ECU to relearn things the MPG may start to increase a bit more.

[ntel]

philr said:

It was I. I changed my sensors because this was the advice from a dealer after it had been put on their diagnosis equipment. It has made the car run much more smoothly, but the MPG has only improved a little bit so far. Maybe once I've given it a few long runs for the ECU to relearn things the MPG may start to increase a bit more.

Ditto.

Changed mine too and all is well again. Savings in fuel will soon pay for sensors. Oh

[Nick P]

well after going to the link above i tested mine and they are fine.....the voltage was switching over every second between 0.2v and 1.2v....so i now know they are hunky dorey....perhaps it's just my heavy right foot that gives me poor mpg!!

[Tyre Smoke]

'Poor' MPG is a state of mind!

Short runs around town with loads of loud pedal can get you into single figures. Long motorway runs at driving Miss Daisy speeds will give near 30 MPG I would think.

Between 20 and 24 would be a fair average.