yep mine does the same thing and im just on 100,000 kms ( 97825km ) mine is standard without any mods but I have been told that the valve springs are the culprit. I dont give it a great amount but when I do give it a bootfull itr feels like its going to cut out and die then it comes good again. im upgrading to the APS phase 2 kit and a auto overhaul in about a week and looking forward to some new power. im not a stranger to power as I have a drag car that runs 9 sec quarter miles and has 485 rwkw ( now will have 890 rwkw after a full rebuild and tubbing and mid to low 7 sec quarters ) I thought the standard power a XR6 turbo was good but ive been told im going to have a never ending smile on my face after the new mods cheers Ernie