Q: On my previous car I could find the spark plugs by following the spark plug wires. I cannot even see the spark plug wires on my new car. Where are they?
A: Many newer vehicles do not have spark plug wires; they have “coil-on-plug” (COP) ignition systems. By eliminating the spark plug wires, your vehicle has a more reliable ignition system. The coil-on-plug system eliminates the need for high voltage spark plug wires that can cause ignition problems over time. Also, if spark plug wires are not properly routed away from the exhaust manifold, the outer insulation can burn. Look for the ignition coils. On coil-on-plug systems the spark plugs are under the coils.