Ok well my problem starts when i turn on my car. takes a couple seconds to turn over. I wait for it to warm up and as soon as it does, it starts surging from 1000-1600..its realli annoying. Also there is a hissing noise like there is a leak sumwhere but i cant realli tell where its cuming from. its sumwhere around the intake manifold by the butterfly valve. On the thorttle body i know of 3 valves that need hoses connected to them, but i dont have them on..i kno this might be causing my motor 2 surge but i covered them up and nothing. i have a map sensor block off so that hose isnt needed. When i take off it seems like my pedal is super stiff so i try giving it gas and it harshly jerks the car forward. I tried adjusting the throttle cable and no solution. When im driving i smell fuel, but i kno that my header has a crack in it. Any help to ease my car from this horror is appreciated