If you have an older car, chances are that one tune-up item you need to pay particular attention to is your ignition system. One item you don’t see too often anymore is the distributor. Most cars, these days, have long since transitioned to distributorless ignition systems, thus simplifying the tune-up

You start your car on a damp morning. The engine sounds like it’s struggling, and for the first moment or two, it acts like it’s low on power before returning to normal. Or, maybe you have a newer car and you’ve just gotten a diagnostic trouble code indicating a misfire.