Hi everyone,

Back again after the initial issues with my 2005 CGT W12 just after purchase (failed boost control solenoid)

The car has been running good and I've been putting some miles on it but I have noticed when cruising along at around 30-40mph the car feels a little jittery (engine doesn't feel smooth) through the accelerator.

When I come off the throttle everything becomes smooth until the engine goes into overrun.

Thought I'd change the spark plugs as I didn't have any records to suggest they had been done so fitted 12 new NGK iridium plugs and decided to change all the ignition coils too just for good measure.

This didn't make any noticeable difference.

Any suggestions welcomed on what to check before I ask GT services to have a look?

Many thanks,
Lewis.