I have read a thread similar to this but would appreciate some clarity. I have just bought an 05 cup 182, after ten mins of driving followed by iddling the exhaust gas monitor light comes on, I have returned the car to renault three times and they say it is a destructive misfire from the 3rd cylinder and have replaced the plug three times, the light still comes on whilst idling after being driven a few mins. does the lambda sensor contribute to the firing of the plugs? could that sensor be the problem or would it be the coils etc. Any advice would be amazing