When i start my S2 turbs up from cold it she fires up fine and idles ok but just for a few minutes and then the revs just drop right down to 600 rpm. This is becoming very annoying and when i start to rev it up it then seems to spluter i think this is due to over fueling but after a few seconds it then clears and when i take my foot off the accelerator the revs just drop back down. But when it has warmed up it idles where it is supposed to at around 850-900 rpm. So i have been told it could possibly be that the injectors are leaking. The car has been tuned up and has been chipped but i cant think what this could be any ADVICE would be appreciated CHEERS oh the other thing is i tryed by adjusting the idle screw but once the engine has warm it revs to high.