over boosting...PLEASE HELP
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hi there people, i've got a 1999 uk impreza turbo and only mod's are cat back exhaust and air filter, but its recently started boosting to about 1.2 bar and instantly dropping to 0.5, i had a new air flow meter, had the restriceter drilled out a little and ecu reset, after a couple of days its doin it again................... any ideas
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