I changed the alternator. The car sat awhile. Replaced alternator. Put air filter back on. Plugged all the little plugs back up. Jumped it off and its reving up and down by itself. You can push the gas and it will not take gas or rev up higher. I noticed the coil pack on top in middle was throwing sparks so I changed it. Also noticed a plug unplugged and i plugged it back in. Nothing worked. Could it be something with the air filter where i had it off. I'm not good with cars and could use some help.