hey guys, i seriously need help, after last night, my car randomly lost all power, i cant even get it over 45mph. RPM is able to go over 3k, but the engine gets really loud. There is a hissing sound thats really loud right under the engine, and my car sounds like it is running on open headers or somethings, its so god damn loud, but its not moving. car creeps when the engine is roaring. no CEL or or any light is on. When i tried starting the car, it would crank but the rpm won't jump, it would crank over but very silently like barely making it. any ideas what might be wrong?? a vaccum hose under car busted?? bad alternator?, bad fuel pump? thanks a lot guys.