I have installed an AFR since a couple of weeks now because I am having a slight hick-up when driving slowly in 2nd or 3rd gear (2500-3000 rpm). Thought that maybe the O2 sensor might be causing this.
When the car is cold, everything is ok...AFR dances up and down. However, when I have driven the car for > 20 min and it's really warmed up I sometimes get a 'stuck' AFR (stuck at one led position) or several leds lighting up at the same time (still going up and down). Sometimes, it changes back to normal operation, sometimes not. I am pretty sure that the AFR is wired correctly (signal from ECU, ground directly from battery).
My MAF sensor and plugs have been replaced recently.
Can this phenomena be caused by a knackered O2 sensor ? I always thought that a broken O2 sensor would cause stuck at readings only.

Someone have any similar experience or thoughts ?

Thanks,
Pim.

 

Anybody any clues ? Can a faulty MAF sensor mess up the exhaust gas mixture ?

 

The short answer is that if the MAF is not working properly it WILL screw up the fuel ratios.

See thread by andybrucefenton, this may help you.

 

Edited cos I'm thick



[Edited by SiPie - 12/31/2002 3:35:46 PM]

 

try this place for sensor info

http://www.mobiletuning.carnuts.co.uk/oxygen.htm