How often should I change my spark plug wires?
If the vehicle is equipped with spark plug wires they should be checked at the time of spark plug replacement, when they are old and crispy just disengaging them from the spark plug can cause them to come apart. A quality set of spark plug wires can last generally around 60,000 to 70,000 miles.
What is a tune up for your car?
There’s no absolute definition of what exactly a tune-up should include, but most would agree that it involves replacing the spark plugs and performing other adjustments to maintain or restore like-new engine performance. The problem is there’s not much that can adjusted under the hood on many late model vehicles.
Vehicle manufacturers make much of the fact that their products come equipped with extended-life spark plugs that can maintain a precise gap for 100,000 miles. However, before you wait that long to replace them, you should bear in mind that spark plugs that hit the 80,000-mile marker are four-fifths worn.