Depending on the plug type, replacement intervals run from about 30,000 miles for older copper plugs to 100,000 miles or more for iridium and platinum plugs. Your owner's manual has the number for your engine.
What Worn Plugs Feel Like
A rough idle, hesitation or a stumble under acceleration, harder starting, a drop in fuel economy, or a check engine light for a misfire. A single dead plug can trigger a flashing check engine light, which risks converter damage.
Why Not Just Wait for Them to Fail
Worn plugs make the ignition coils work harder to jump the gap, which can kill a coil — turning a plug job into a plug-and-coil job. On many engines the plugs are buried under the intake, so it's labor you'd rather pay once.
Done as Part of a Tune-Up
Plug replacement usually goes together with new filters and an inspection of the coils, wires, and ignition system, so the whole ignition side gets refreshed at once.
Tune-Up Service for Albuquerque's North Valley
We're at 4201 4th St NW in the North Valley. See our tune-up & spark plug replacement for what's included, or read what that warning light means if the check engine light is on.