Hi Everyone, I'm new here, but I've been searching through this awesome forum since I got my own P11 in August. Mine is a 2000 G20t. I've had a problem with some sort of engine hesitation ever since I got it, and I've tried so many things already: I changed the plugs, wires, cap, rotor, pcv, fuel/air filter, O2 sensor. All parts are from the dealer except the plugs, which are ngk G-Power (plats) BKR6EGP, pcv, and the filter is K&N. Basically, the car hesitates on the highway, usually when cruising at about 120km/h. It also hesitates when I try to accelerate hard, and so the performance of the car is pretty bad. I also find that it sometimes becomes powerless on the hwy... I absolutely floored the accelerator in 5th gear, and it was struggling to accelerate beyond 125km/h. Things got a bit better after replacing all the parts, but still on the highway and sometimes acceleration it just bogs... I put in some fuel injector cleaner but it hasn't helped. I changed all the parts after the CEL came on and indicated intermittent misfires. The light hasn't come back on since. Also, I don't know if its related, but when I start from a rolling stop on 2nd gear at about 1500rpm, I hear a water-like rattling noise until I'm back up to 2000 rpm. I'm desperate for a solution... Any ideas?