Turbo Not Starting When Hot

Basically it starts from cold and runs absolutely fine, but it won't restart when the engine is already hot. The car has been sat on the drive under a cover but I'm thinking maybe some engine sensors have gotten damp? Any idea where to start? Also, when it won't start I can't hear the fuel pump prime. As soon as it's cooled down it'll start again and run up to temperature. It does not cut out, but once I've switch it off that's when it won't start again.

Thanks.

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cheap things to try , check the relays in the boot

Yep as Steve points out check relays also check earths & connector of doom

DG

if its only while hot, that sort of points to a sensor

My old tubby used to do this, fuel pump relay was faulty.