Idle revs increasing on FR TDI

[krussel]

TBH id be looking into why it is shuddering.
whilst the PD is a harsh engine the idle is usually good with only slight shuddering when the fuelling an timing are being adjusted whilst idling.
shuddering is usually caused by knackered DMF ot tired rear dogbone mount, sometimes the shuddering is actually a misifre caused by injector wiring loom dying.
has this car been only lightly driven before as could be egr system coked up

Oh dont start me on this please

It shuddered from the moment i picked it up with 7 miles on the clock.

Its a common fault which effects certain 130 bhp tdi across the vag field. Its caused by under fueling on tickover, mainly when the engine is warming up 70-90 deg. There is no known cure but a slight increase in tickover smooths it out.