1.8T juddering

My golf mk4 1.8T has just been is for service at a VW van service center.

It is running really bad, very lupmy and jerky, on part throttle it judders untill you put your foot flat down.

I thought it just needed a service (hadent had plugs for 30k ) they pluged it in to VAGCOM and it brought up no faults...any ideas??

 

so, has it had the service and is still running badly or other way round??

 

Just come out of full service and still running badly..no faults shown up..and technicians sratching heads.......

 

prob an old school problem that doesn't show up on the Vag-Com

did they check the plugs, to see the condition of them, I know there long life plugs, but I still like to take them out for a clean, it can do wonders

does the throttle plate need cleaning (depends on the mileage)
Edited by: Crispy 8V

 

Plugs was changed on this service, cant imagin it would be something as simple as the trottle body..

when driving a 30mhp in 3rd or 4th it really judders you cant keep it at 30 easily..

 

Perhaps you've got an air intake leak somewhere?

 

MAF Sensor perhaps? They dont always show up on a fault reader when they go wrong.