ok... done the soapy water test today.... no leaks in the main boost circuit... im 100%sure no leaks (from turbo to carb top + actuator to carb base)
the one im thinking that may be affecting it (hoping its it).. is the vacuum pipe going to the oe boost gauge... ive taken it off now n blocked it... wanted to do another test run but the belt keeps slipping/breaking off!! the pulley has a ridge on it!! so no more testing til i get another pulley (which ive ordered today from renault) .. i js hope it is this pipe that was causing the issue cos this is the ONLY one ive not touched before.... il do a test run soon again.
il keep you guys updated (and yes i also strongly think it must be a leak somewhere ... obvoiously) but this ones not an easy one...as ive had many people look at it.. including k-tec! and many other people who know these cars inside out.... n im not so bad myself (not tryin to big myself up) ..... no ones ever found it.... so im js baffed!
OH 1 More thing...
Can someone pls re-assure me.. it cant be anything to do wiv any valve's or engine component or exhaust blow or somthing... cos as far as im aware doesnt even matter if u have no exhuast....