Because you held the key back with force, and it started, I'd agree with you that yours is an electrical issue, and probably with the contacts/wiring to the ignition switch.
Check these first. You'll have the contacts directly on the back of the ignition lock, wires going down the steering column, and half-way down the column you'll have a junction block, and then those wires will lead to the fuse box. Check all of those with either a DVOM or a test light.
I suspect the terminals on the wires that plug into your ignition lock are corroded or loose.
If none of these check out, let me know and we'll proceed from there. Good luck.
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Monday, February 22nd, 2010 AT 7:49 PM