Once in awhile the car is hard to start. I is getting juice and turning over, but not ignition. Battery and starter about three years old. Wires, cap, rotor, plugs replaced about 5 years ago and runs good. The lock cylinder was suspect and replaced that, same problem. My brother tried to help and just 'rebuilt' the ignition switch (he should've replaced it for little as it costs!). Still have same problem. I'm assuming it's still the ignition switch. Any other common problems to look for? Thank you!