Spark Plugs & Ignition Tools

Spark Plugs & Ignition Tools keep your engine firing cleanly, starting reliably, and running at peak efficiency. This category brings together the gear you need to service and diagnose ignition systems across cars, trucks, motorcycles, boats, and small engines.

Choose the right spark plug sockets to protect delicate ceramic insulators and reach tight plug wells. Look for 5/8 inch, 13/16 inch, and thin-wall 14 mm/9/16 inch sizes, with magnetic or rubber retainers and swivel/long-reach designs to speed removal in cramped engine bays. Pair them with a quality torque wrench to seat plugs to spec—preventing stripped threads, blown-out plugs, and heat transfer issues.

Set plug gaps accurately with a wire-style gap gauge or feeler gauges. Correct gap improves cold starts, fuel economy, throttle response, and emissions. Plug boot pliers and ignition coil pullers help you remove boots and coil packs without tearing seals. A thread chaser or repair kit cleans or restores plug threads in aluminum heads, saving time and avoiding costly head work.

For quick diagnostics, use an inline spark tester to confirm spark strength, or a noid light to check injector pulse during misfire hunts. Older and performance engines benefit from a timing light for accurate ignition timing. A compression tester adds deeper insight into cylinder health, validating whether misfires stem from ignition, fuel, or mechanical issues.

Practical tips:
- Work on a cool engine and blow debris from plug wells before removal.
- Verify the correct plug heat range and factory gap; adjust only if specified.
- Apply dielectric grease inside boots to prevent arcing; avoid anti-seize unless the plug maker recommends it.
- Inspect coil boots for cracks and replace worn wires or coils to prevent future misfires.

Shop Spark Plugs & Ignition Tools to reduce misfires, restore power, and extend engine life—whether you’re a DIY tuner or a professional technician.