Showing specs for all NA & NB Miatas

Fuel line pressure — engine idling (NA6)

216–265 kPa (2.2–2.7 kg/cm², 31–38 psi)

Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure

Gauge between main pipe/main hose; start/run engine idle; measure. Relieve pressure before gauge installation.

Applies to
  • NA 1990–1993 (B6) — Other years in this family inferred from 1990 factory evidence with owner approval; actual-year verification is separate.
  • Verified in: 1990 Mazda MX-5 Miata Workshop Manual
Sources

Also in Additional factory manual gap audit