So 2 weeks ago I went to north Weald for a drivers day and first run and reduced power. Kept happening every other run. With fault code flagging boost sensor which is a common failure apparently.
Cleaned my MAF at the same time as symptoms pointed to boost sensor, vacuum leak or MAF.
I checked all hoses but couldn’t see anything and after cleaning the MAF still some rough running. On running the car today to check something must have moved a bit more as straight away I could feel rushing air by the intake.
And voila
View attachment 36419
Hose had popped off the clamp for the intercooler. So tomorrow’s job is can I do it without taking the front bumper off!