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Thanks for all the reply's, still no luck though. Well I removed the cats and still the same:( The boost gauge says its boosting about 9psi but it sure as hell doesn't feel like it lol. Also the car is super sluggish from start(800-1500 RPMS), I mean probably slower then a Prius. This is my...

Il go ahead and look into the cat problem, also i dont think its something wrong with the vacuum. The way it drives and feels. It picks up speed slower then a n/a protege so i feel like the turbo isnt the suspect here.

Yes and it read 8psi under throttle. Been searching and still no luck. Any input is greatly appreciated.

Thanks for the fast replies. It wasn't this slow before. It feels like its dragging a tractor. After getting the ECM updated I raced my brothers 1999 civic HX (116 HP) he just embarrassed me. The Revs climb extremely slow I have no Idea what it could be. Could a bad cat really do that?

Kinda like the title says my 03 MSP is SUPER SLOW!!! There is no check engine light. However I have gotten a P0300 code recently ( multiple cylinder misfire). So far I replaced the coil packs and had the ECM updated by the dealer. The car still is super slow, feels like something is dragging is...