# Fuel line pressure — engine idling (NA6)

Canonical URL: https://miatatorque.com/spec/fuel-line-pressure-at-idle-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

216–265 kPa (2.2–2.7 kg/cm², 31–38 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-line-pressure-at-idle-na6",
  "name": "Fuel line pressure — engine idling (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": "216–265 kPa (2.2–2.7 kg/cm², 31–38 psi)",
  "procedure": {
    "notes": "Gauge between main pipe/main hose; start/run engine idle; measure. Relieve pressure before gauge installation."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1990",
      "page": "F–111 (PDF p. 255)",
      "as_printed": "Fuel line pressure:\n216—265 kPa (2.2—2.7 kg/cm², 31—38 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-line-pressure-at-idle-na6/"
}
```