# Fuel pump maximum pressure — blocked-outlet test (NA6)

Canonical URL: https://miatatorque.com/spec/fuel-pump-output-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

441–589 kPa (4.5–6.0 kg/cm², 64–85 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-pump-output-pressure-na6",
  "name": "Fuel pump maximum pressure — blocked-outlet test (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": "441–589 kPa (4.5–6.0 kg/cm², 64–85 psi)",
  "procedure": {
    "notes": "Fuel pump output specification, not fuel-rail regulated pressure. Follow the factory pump test and fuel-pressure relief procedure. Release fuel pressure first (F–101), battery disconnected while gauge fitted directly to main pipe, gauge outlet plugged. Reconnect battery; jumperF/P–GND; ignitionON operatespump; measure; ignitionOFF and removejumper afterward. F–108 prints 4.6 kg/cm² while F–9 prints 4.5 at the same 441 kPa endpoint; metric kPa controls. This is not an engine-running rail-pressure target."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1990",
      "page": "F–9 (PDF p. 153)",
      "as_printed": "Fuel pump\nOutput pressure\nkPa (kg/cm², psi)\n441—589 (4.5—6.0, 64—85)",
      "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–108 (PDF p. 252)",
      "as_printed": "Fuel pump maximum pressure:\n441—589 kPa (4.6—6.0 kg/cm², 64—85 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-pump-output-pressure-na6/"
}
```