has been staying on the revs while changing gear
Just to shed some light thats one of my issues on my car:
My car has an intermittent fault with the crank speed sensor (or its wiring) which seems to stop the revs dropping back after lifting off/changing down. Its fine changing up. Could take 15/20 seconds to drop from 5000rpm to idle.
When pulling hard up through the revs it also misfires quite violently around 4500rpm as if all ignition is being cut for a split second.
The third symptom happens on idle it tends to kangaroo between 750rpm-1200rpm.
Its an intermittent crank speed reading fault according to vagcom, and if I'm getting any of the above I'm usually getting all 3 so have a feeling they are all linked. Car is fine 6 days out of 7 but when its playing up its a nightmare around town...
EDIT: My reading of my problems is that the crank sensor is unable to tell the engine what rpm its doing hence the rpm related faults. I've never had any throttle position sensor faults on my car on the vagcom maybe OP could look at the crank speed sensor.