Jcos2007

I have a boost problem on my 1995 classic import. Basicly every now and again it drops to 0.5 bar keep driving and then it will go back up again to 1.1 peak and holds 0.9. When it drops to 0.5 if you keep your foot down it will get to 0.9 at high revs but it's sluggish. I have changed the 3 port and tried another so I don't think it could be that. I've had a look for splits in hoses but with it being intermittent I can't see it being that. Also changed the map sensor. Actuator seems tight. I just don't know what it is. No cel light comming up. Any ideas chaps?

Thanks

Jcos2007

Anyone?