mine does the same , every time when i start it ,dosnt like to be revved, onli when its warmed up it revs good, even then it still chokes then revs(sounds like coh vrrrooommm when i rev it in nutral), ive cleaned out tb and plenum , running synthetic oil, new plugs, k&n panel, i no the tiking is my lifters, they just need a good clean which is wat the syn oil will do over time, but this choking is wat i dnt like, i have to let the car warm up a bit b4 driving cold, otherwise it stutters and chokes...any1 rekon it could be fuel reg or leads(look new but). mums vt dont do it and mates vs dont do it either...would like to know also wat the cause of this prob is too.