Your engine relies on a strong spark to run smoothly and efficiently. Most car owners replace their spark plugs regularly. But did you know that you can lose a huge percentage of spark intensity to worn spark plug wires? Even the smallest crack in your plug wires' insulation can cause weakened spark or even engine misfiring, a condition that can trigger the dreaded Check Engine Light. If your plug wires are questionable, replace your spark plug wires today.

My ’04 dadge Ram PU has never had spark plug wires changed. Should I if no wear visible?
Check out http://www.serfax.com. I think that your readers would benefit from this free service. It allow you to track your vechicle maintenance records online. And it is FREE. You can track up to 100 vehicles per login id and you can even scan in and store receipts of your service records online. Thanks for you consideration.