# Fuel line pressure — engine off, pump operating (NA6)

Canonical URL: https://miatatorque.com/spec/fuel-pressure-regulator-pressure-na6/

Applicability: NA 1990–1993 (B6) — Other years in this family inferred from 1990 factory evidence with owner approval; actual-year verification is separate.

Confidence: fsm

265–314 kPa (2.7–3.2 kg/cm², 38–46 psi)

Always confirm against your factory manual. Match every restriction and follow all stages and procedure notes. Disputed claims must not be automatically resolved. The complete record below preserves every printed unit, source claim and procedure.

```json
{
  "id": "fuel-pressure-regulator-pressure-na6",
  "name": "Fuel line pressure — engine off, pump operating (NA6)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NA",
      "years": [
        1990,
        1993
      ],
      "engines": [
        "B6"
      ],
      "note": "Other years in this family inferred from 1990 factory evidence with owner approval; actual-year verification is separate."
    }
  ],
  "kind": "non-torque",
  "value_text": "265–314 kPa (2.7–3.2 kg/cm², 38–46 psi)",
  "procedure": {
    "notes": "Specification-table regulating pressure, not an unrestricted pump-output target. Follow the dedicated factory pressure-regulator test. Release pressure before fitting gauge between fuel pipe/main hose. JumpF/P–GND; ignitionON; measure. Distinct from idle vacuum-connected pressure."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1990",
      "page": "F–9 (PDF p. 153)",
      "as_printed": "Pressure regulator\nRegulating pressure\nkPa (kg/cm², psi)\n265—314 (2.7—3.2, 38—46)",
      "verified_years": [
        1990,
        1990
      ],
      "document": {
        "id": "fsm-1990",
        "tier": 1,
        "title": "1990 Mazda MX-5 Miata Workshop Manual",
        "part_number": "1193-10-89C",
        "covers": [
          {
            "gen": "NA",
            "years": [
              1990,
              1990
            ],
            "engines": [
              "B6"
            ]
          }
        ],
        "url": "https://archive.org/details/1990-mazda-mx-5-miata-workshop-manual_202411"
      }
    },
    {
      "source": "fsm-1990",
      "page": "F–103 (PDF p. 247)",
      "as_printed": "Fuel line pressure:\n265—314 kPa (2.7—3.2 kg/cm², 38—46 psi)",
      "verified_years": [
        1990,
        1990
      ],
      "document": {
        "id": "fsm-1990",
        "tier": 1,
        "title": "1990 Mazda MX-5 Miata Workshop Manual",
        "part_number": "1193-10-89C",
        "covers": [
          {
            "gen": "NA",
            "years": [
              1990,
              1990
            ],
            "engines": [
              "B6"
            ]
          }
        ],
        "url": "https://archive.org/details/1990-mazda-mx-5-miata-workshop-manual_202411"
      }
    }
  ],
  "jobs": [],
  "system": "fuel-intake",
  "component": "gap-followup-2026-10",
  "componentName": "Additional factory manual gap audit",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/fuel-pressure-regulator-pressure-na6/"
}
```