Running rough .. .. Spluttering

2006 Seat Altea 2.0 Turbo diesel sport
Car: Seat Altea
Year: 2006
Variant: 2.0 Turbo diesel sport
Categories: Running Rough, Starting & Power Loss
My car runs really badly between 2000 and 2500 rpm, with little power when you try to accelerate. This problem gets significant better when the fuel tank is near quarter empty ???

No engine management issues, no other issues. I have run two tanks worth of fuel with STP diesel injector cleaner .. .. Not any better or worse .. .. Any advise greatly appreciated.
Problem added: Dec 9, 2011 (12 years ago)
Check the boost pipe .
Answered Dec 9, 2011 (12 years ago)
This link should help you ,

http://www.seatcupra.net/forums/showthread.php?t=231225
Answered Dec 9, 2011 (12 years ago)

This problem is archived

If you're having a similar problem please click below to re-post this problem, you can then customise it to suit your situation.

More problems with the 2006 model year Seat Altea

We have 4 problems and solutions in our database for this model year of the car.

View all Seat Altea Problems