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1990–1997 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 NA?

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

Are coil and wire upgrades helpful on older NAs?

Fresh coils and low‑resistance wires improve spark energy and reliability, especially with 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 quickly diagnose misfires.