Need help with Iginition switch/starter issues

The fact that you have to wiggle your key to get the tach to drop back down and that you had to bypass the key by using a push button start kind of makes me think maybe your looking at an ignition or the wiring in your column as being the culprit.

also , you might want to check the connection on the drivers side of your gauge cluster.

check your column ground.

check fuses and all the basic stuff.

check to make sure the relays are goo and what not.

I would think your start is good considering you can get it to fire up.

so you are probably looking at the problem being from the relay back.