Hi mate, you exactly describe what's happening to my car!!
It's really annoying when your throttle pedal is hovering between being on the gas and being off, suddendly the car will lurch!!
I think I'll book mine into the stealer yet again, and see what they think, again...
I'll change this oil temp sender if someone can tell me where it is, etc!??!
I have a new coolant temp sensor, throttle body, dump-valve, N75 valve, MAF. None of these made a difference!!