Originally Posted by MarkJunedd
Firstly what is a MOT valve ?? Never heard of that before. Although i could hear something ticking on the passenger side while i was using the reader. Though surely a vacuum leak in this area would affect all cylinders not just no6 ?
Valve is used to vent the charcol fuel tank vapor canister Onboard refueling vapor recovery - Wikipedia, the free encyclopedia
I wasn't assuming the bad Lamda etc was specifically realted to the misfire code. Using the code reader on to look at the lamda sensor and fuel trim readings for each bank - might help confirm things.