Lately my 85 Diplomat Salon is giving me a no start condition. I checked for spark and there was none. The mechanic replaced cap and rotor and "Rosie" was okay for a while. Went out one morning and she didn't start. Just cranked. I got out, removed the distributor cap and rotor, jimmied it a bit and put it back on. It started and was good for about a week. Let it sit for a few days, attempted to start it and, no spark again. It's a 318 2V civilian model with electronic spark control. Is there anything obvious I should be looking for? Thanks for any assistance.