Good evening gents. With limp mode solved I’m ready to start building my S5 Fc into a drift car but it’s got one last problem, when I start the car it idles to about 4500rpm for about 26 seconds then it will fall down to 1500 while constantly bouncing up to 2k rpm every half second sounding like a Chevy with a huge Lopey cam, it pulls hard so I’m not thinking it’s a misfire.

Additionally. It has very jerky throttle response and when just barely applying gas while already crushing the car will jerk hard and smooth out as more throttle is applied.

Any advice that gets me on the track sooner this coming season is appreciated!