I'm having problems with my camaro at start up. I have a 97 Z-28. The problem that I'm having is that when I try to crank the car on a cold engine, it will roll over but won't actually crank. I have found that if I bump the ignition a couple times, it will eventually crank. The thing is, it doesn't do it when the engine is up to temperature. (such as when I drive somewhere and start back up before the engine cools off. I have already replaced the crankshaft sensor, what do you think the problem may be? Thanks for your help, Alan.