Hey all I have a VTII Clubsport LS1 auto. I'm having trouble with it surging and a substantial loss in power. When its cold its fine but after around half an hour of driving it starts happening. If you put your foot down to less than half it really struggles to get going and surges. Give it WOT and it goes as it should. It has no codes and engine light never comes on. Been searching the forums but can't seem to find what I'm looking for. I have a obd scanner and the 02's volts are flickering as they should so I'm a bit stumped! Have cleaned throttle body and maf aswell Any help would be greatly appreciated!