Please help me. I have 1970 Plymouth Duster that will crank but won't start. The parts I have replaced are: Starter, relay, coil, and spark plugs. I took spark plug out and tested but am not getting spark. I also took distributor cap off and can see the rotor turning. I don't know what else it could be?? So to recap.. the car cranks and I'm getting fuel but NO spark. Thank you for any help I have been go ogling and trying to fix this car for weeks. It's starting to drive me up the wall!