A6 Avant 2.5tdi quattro tiptronic - new pump = bad MPG and power
Just a quick question - hope I'm posting in the right place
We have a 1999 A6 Avant 2.5tdi Quattro tiptronic which we've had for the past 7 years. Fontains did a cambelt change and full service 5,000 mile ago. about 1,000 miles ago the car just wasn't right, down on power etc, then 4 weeks ago it just cut out dead when I was accelerating. Got it into TC Garage in Sussex and after a week looking around (no error codes apparently) they announced it was the high pressure pump. We needed the car over Christmas so could not afford to wait for a recon unit so told TC's to fit a new one (not cheap! )
Anyway we were told the car was ready at 11.00 Christmas eve so went down to pick it up but it's not right. Did a couple of 60 mile dual carriageway runs the last 4 days and whereas we would normally get high 30's to low 40's mpg on that run we are struggling to get 31mpg - around town I'm lucky to get 20 mpg. The power is down as well - previously acceleration from 60 - 90 was a good solid push in the back, now it's gutless - torque feels really low and the tiptronic keeps trying to change down a gear to get the power on - it never used to do that unless I floored it. Also it's not starting as easily as it used to
I suspect they rushed the job and didn't time the pump properly - How would I find out if the pump timing is out and how much of a job is it to get it done properly ? Bearing in mind we just paid a lot for investigation, new pump and fitting, I'm thinking of going to GCS engineering in Horsham, Sussex, has anyone tried them before ?
The car has 130k on the clock - it runs relatively cool but always has done.
Any suggestions would be very welcome