I would have to ask how heavy is your key chain, a lot of people don't know that if they have any more weight on the key chain then the car came with new it will start causing shorts in the ignition switch... so start there, next major problem is the transmission sensor in those cars, will cause the same problem... I believe when u change the ignition switch in that car you need to have the key programmed again.. or it will not allow the unit to start... anti theft deterrent. But either case a proper mechanic should be able to diagnose the problem...
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I would have to ask how heavy is your key chain, a lot of people don't know that if they have any more weight on the key chain then the car came with new it will start causing shorts in the ignition switch... so start there, next major problem is the transmission sensor in those cars, will cause the same problem... I believe when u change the ignition switch in that car you need to have the key programmed again.. or it will not allow the unit to start... anti theft deterrent. But either case a proper mechanic should be able to diagnose the problem...