my dodge shadow will lose power when i get up to high RPM's. it is a pretty quick little car but i want to be able to whined out my gears. when it hits 4 to 5 RPM's it sounds like its spitting.i don't know where its coming from. i think its coming from the header gaskets or has something to do with the exhaust so if anyone could help or point me in the right direction to get the power back out of my car that would be great. thank you.