nessscoob

Hi i recently bought an imported 94 wrx but have noticed that sometimes, at speed and full throttle, the engine seems to cut out and in in short "blips". It feels a bit like a fuel cut but as the car is running standard boost I don/t see how fuel cut would be affecting it. The car has been de-restricted and has no mods apart from a turbo back exhaust. At first I thought it was the AFM but I have replaced the old on and Im still havin same probs. anyone any ideas? Cheers