Alright, I checked all the vacuum lines coming from the intake manifold and all were firmly connected. I also took a look at all the other vacuum lines and they were also firmly connected. I tightened the gas cap and the idling went down to about 2000rpms. After driving around for a while, the idle dropped to 1000rpms, but now the idle is uneven. I keeps going up and down slightly. The idle is tremendously lower now, which is good, but the unevenness of it has me wondering. Anybody have any ideas?