Hi guys,

Co levels all back to normal (pass the emissions test MOT spec) after changing O2 sensor, O2 sensor is now switching better than 1 hz at 2500 rpm. reason I changed it Mark was O2 sensor had no activity and was showing lean (go rich) when CO was high with no exhaust leaks found. Pete the de-phaser is Renaults term for the variable cam timing actuator on the end of the cam shaft, and no it won't tickover at any time. I have had these causing stalling problems but they usually show a fault code, I'm taking the manifold and throttle body off for inspection tomorrow I'll let you know how I got on.

Many thanks.

Mark