ignition wires, spark plugs and air filter. Worked fine for a couple of days. Ran an errand, car wouldn't start. Started on third try. Had mechanic replace ignition rotor and distributor cap. Worked fine for couple of days, ran an errand, car wouldn't start until the 7th time. Started up and drove it home. I was told it was not a fuel filter problem. There is no "clicking" (solenoid problem) or battery corrosion.The car is clean, garaged, rust-free. What now?