HELP!! 04 Cooper S very high fuel consumption on the next day
I have an '04 Cooper S with an Alta performance upgrade. Absolutely in love with the car.
But the car started to eat a lot of gas, almost 20l/km with no sign.
- new spark plugs - factory
- new spark cables
lambda sensors checked - working perfect
air mass flow sensor checked - working fine
Any suggestions? carbon canister valve?
Also the car sometimes only starts on the 2nd ignition. But than it starts immediately. Does not matter if the engine is cold or hot.
Any suggestions on this?
Thanks and all tips, ideas are welcome