beller

Hi everyone for the first time =) Just got myself a S2 escort rst in great nick, just a problem with the turbo boost.
The engine runs and idles fine at all times but when the turbo is worked medium to hard it will boost well to start then splutter for a second or two then boost hard up to the gear change.
Had the car a couple of weeks and the guy did say the rotor arm needs changing but I guess its gonna be more than that. The car is standard and had been in dry store since 96

Thankyou for any ideas
Chris