i really hate doing this but im lost and confused. i just changed the valve cover gaskets in my car on both sides along with the manifold gasket. i hooked up everything right and after i went to start up my car the idle was up to 2000rpm-2300rpm then went down to like 1800-1900rpm just to like jump back and forth on it. what did i do wrong thats making it idle up so high?? my dad and i have looked around everything and we hooked all the wires and everything up and i disconnected the battary for like 10-15 mins and it still did the same thing