I had my EGR replaced at 3 months (6000 miles) and since then has been fine until a couple of weeks ago. it seems worse if the car has been standing for 45 minutes or so after a run. I know its the EGR again as switching on the AC cures it - originally suggested by Murphwiz. some days tho' its perfect!Reported it to the local Kia garage - Victor Wood - who immediately said it could be a pipe thats blocked, but they'd ensure they had a new EGR ready for when it goes in for its 20,000 service just in case - next week. It's a bit of a bummer, but I feel it's a little unfair to just blame KIA as the EGR is part of the Bosch CRD system and the service manager, who is relatively new, says he changed loads at the Vauxhall garage he previously worked at and he knows the local VW garage has also changed some.It does seem worse when using gentle acceleration, hard acceleration means you get through the power band (1700-2100RPM) where it occurs quickly.Just Google EGR problems!
Other than this problem my Carens has been great from Day 1. Cruises all day at 60/65 and has now settled at around 44/45mpg each month with mixed town/dual carriageway running. (I reset my trip computer on the 1st of the month)
Certainly Victor Wood have never indicated that the problem has anything to do with either the way I drive, or the type of trips I make.
On the other hand, my brother in law also has a Carens, bought new last October, and has not had a hint of surging.
Just make sure that anytime you have a problem that you report it to the local KIA garage to ensure its logged against your vehicle - that way KIA cannot deny responsibility when it all goes t**s up!