Opel Corsa Gamma high fuel consumption town, more problems found.

An update video of what I found on the Opel Corsa in the past few months. Loose spark plug wires causing bad / misfire. After fixing it in town fuel consumption came down 16%. Exhaust pipe looks cleaner and spark plugs white. Video shows how to test oxygen/lambda sensor quickly so you can decide if you need to buy a new one or not.