Mini Clubman Engine Running Rich

That sounds a lot like what happened with my Clubman. I had similar symptoms – check engine light, rough running, and the fuel consumption went through the roof! It felt like I was pouring fuel straight down the exhaust pipe. Did you notice any jerking when accelerating? It could be a rich mixture problem messing with your catalytic converter and maybe even the oxygen sensor. I'd definitely get the fuel injectors checked out.

Appreciate the quick reply. You mention fuel injectors – was that the definite cause in your case? And did the problems start suddenly?

Yes, fuel injectors were the culprit. It was like one of them suddenly decided to overdo its job, flooding the engine with fuel. It didn't get better by itself so I took it to a workshop. They diagnosed it pretty quickly. Better get it checked to avoid damaging your catalytic converter.

Just wanted to give a quick update. The garage confirmed it was indeed a faulty fuel injector. They replaced it and the car is running smoothly again. Total cost was 515€. Thanks for the insight!