Hi, I have a 1988 420 SEL @ 101K miles. The plugs, ignition wire set, and distributor cap/rotor were last replaced at just under 50K. Within the last month or so there have been a few times when the car didn't start right up. Given the facts do you think it's time to replace the parts listed above?

P.S. I'm asking the question b/c about a year ago I paid for a full diagnostic and the ignition was cited but I decided to put it off until absolutely necessary. Thought I would poll the group here especially since i don't want to pay again for a diagostic which was done in a different state from where I now live.

Thank you much.