logiclee

My boss has a 2001 Classic Wagon, twice over the last couple of months he's been driving along and just lost all boost.
I drives like a 2.0 Sport then after a couple of minutes the boost will be back and it drives normal.

The last time it did it he had it on a Select monitor but didn't show any faults. He doesn't get any warning lights.

So what do we think?

Possible dumpvalve sticking open? He says there is no kettle or blowing noise.

Wastegate or actuator problem?

Stalled knackered turbo? It's low milage and he looks after it.

Anything else?

Cheers
Lee