Renault Master Mixture Preparation Errors

I had a similar issue with my Master – felt like I was driving a tractor! Reduced engine power and the jerking, oh man, I feel your pain. Have you had a look at the throttle body? Could be clogged up, messing with the air-fuel ratio. It's worth a check before you start replacing injectors. What about the mass airflow sensor? A faulty sensor can cause all sorts of weird issues too.

Thanks for the quick response! Throttle body and MAF sensor, huh? I haven't checked those yet. How did you figure out it was related to those things? And how involved was it to check them? Did you need any special tools, or is it something a complete novice like me could handle?

The symptoms were almost identical, and a friend of mine who knows a bit about engines suggested it. To be honest, I wasn't comfortable poking around myself, so I took it to a workshop. They ran diagnostics and confirmed the issue. Best bet is to get it checked out professionally. For me, the problem was indeed an injector. Got it sorted for 515€. Fuel injection problems are tricky, and you don't want to make things worse!

Right, I hear you loud and clear. I'll book it in with a good workshop then, no point in making a bad situation worse. Thanks so much for sharing your experience, I really appreciate it! At least I have some idea of what to expect now.