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1999–2005 Mazda MX-5 Miata Ignition FAQ's

Please read our FAQs page to find out more.

What plugs should I run on a tuned or boosted NB?

One step colder than stock with a tighter gap helps prevent blowout under boost. Match heat range/gap to your tune and fuel.

Are coil and wire upgrades helpful on NBs?

Fresh coil packs and low‑resistance wires improve spark energy and reliability, especially on higher cylinder pressure or ethanol blends.

How often should I service ignition components?

Inspect plugs and wires regularly; heat and age shorten life. Keep a spare gapped set for events to diagnose misfires quickly.