- Joined
- Apr 13, 2013
- Messages
- 3,222
My Accord has almost 200,000 miles on the original ignition system (sans spark plugs changed once). Cap, rotor & wires are often mentioned as part of a complete tune up. What are some signs they are going bad? My car seems to run fine but should I just replace them anyway since they're most likely past their prime? Or should I just follow "if it ain't broke....?" Would I see benefits such as smoother idle, higher MPGs, etc?