I've noticed over the last few months recently that when driving the car from a cold start that it's not running as well as it should (or used to). There's a noise that sounds like the turbo keeps spinning up and down, and it feels like the engine is hunting a bit (if people still use that phrase!?). It's certainly not right but no idea to where to start, boost leak, actuator, MAF or something else? I'm not not much of an expert with FI on cars so don't know where to start.
It's booked in for a service in 2 weeks and to have top mounts done, so i'd like to try and figure out beforehand if possible, if not then i'll get the guys to sort it out when it's in.