Yeah good question. I didn't feel too much hesitation on throttle or anything like that. I did wonder if part of the surge at idle was fuel pump related though.. kind of like only a certain amount of fuel was getting through it? I dunno though, this is month 3 with a Land Rover of any type for me so I don't know what I don't know so far. I'm generally mechanically inclined and it made sense only if to say it felt a bit like an old carb that needed to be cleaned out lol.