Hi. My original s2 has been running poorly. Its been hesitant on acceleration ,sometimes doesnt start, and doesnt seem to boost at all.

Ive replaced the fuel pump relay and the starting is fine now. Also doesnt seem to hesitate so much but doesnt seem to boost at all.

Im going to put a boost gauge on it soon but cant feel no turbo boost. I can hear the funny high pitched electronic noise (i think its the wastegate) but no increase in power. Like it runs like a n/a 1.6.Ive checked all the boost hoses for leaks and they are ok. Ive tried turning the ignition on (not engine running but all lights) and unplugged the amal valve and put it back on but there is no clicking noise so does this mean it is faulty?
Can i bypass it to check the actuator is ok? Can I bypass with a bleed valve (id make sure it wont run anymore than 8psi as isnt chipped)?

The car is completely standard and has done about 130k.