Hi again i have checked all the sensors for resistance and voltage and all seem to be as described in the online diagnostic manual.
The symptoms are when idoling the engine hunts from about 1000rpm to about 500 rpm and back again when pressing the throttle slightly the engine runs rough but when the rpm getts to about 1500 it runs great and on boost is fine aswell. the tps seems to change resistance and voltage smothly the only sensor i found that was near the top of the resistance scale was the map sensor but again the voltage changed smothly when revving the engine all vac hoses seem ok as well all changed about 6 months ago when rebuilt any more ideas would be great