# Engine idle speed (NB2 and Mazdaspeed)

Canonical URL: https://miatatorque.com/spec/engine-idle-speed-nb2/

Applicability: NB 2001–2005 (BP-Z3) — Other years inferred within NB2 non-turbo family from actual 2003/2005 factory evidence.; NB 2004–2005 (BP-Z3-TURBO) — Actual2005 factory evidence; 2004 inferred within MSM family.

Confidence: fsm

750–850 rpm (800 ± 50 rpm)

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": "engine-idle-speed-nb2",
  "name": "Engine idle speed (NB2 and Mazdaspeed)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NB",
      "years": [
        2001,
        2005
      ],
      "engines": [
        "BP-Z3"
      ],
      "note": "Other years inferred within NB2 non-turbo family from actual 2003/2005 factory evidence."
    },
    {
      "gen": "NB",
      "years": [
        2004,
        2005
      ],
      "engines": [
        "BP-Z3-TURBO"
      ],
      "note": "Actual2005 factory evidence; 2004 inferred within MSM family."
    }
  ],
  "kind": "non-torque",
  "value_text": "750–850 rpm (800 ± 50 rpm)",
  "procedure": {
    "notes": "Warm engine to normal operating temperature; fully charged battery. Start with MT in Neutral or AT in P, electrical loads off, and cooling fan stopped. Read engine-speed RPM PID with factory-compatible diagnostic equipment. Use the complete factory Engine Tune-Up procedure for inspection setup. This record provides the inspection value."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-2003",
      "page": "Engine Tune-Up, Ignition Timing Inspection (PDF p. 567)",
      "as_printed": "Specification\n750—850 (800 ± 50) rpm",
      "verified_years": [
        2003,
        2003
      ],
      "document": {
        "id": "fsm-2003",
        "tier": 1,
        "title": "2003 Mazda MX-5 Miata Workshop Manual (electronic manual capture)",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2003,
              2003
            ],
            "engines": [
              "BP-Z3"
            ]
          }
        ],
        "note": "Normally aspirated BP procedures audited; turbo procedures are covered separately."
      }
    },
    {
      "source": "fsm-2005",
      "page": "Engine Tune-Up, Ignition Timing Inspection (PDF p. 649)",
      "as_printed": "Specification\n750—850 (800 ± 50) rpm",
      "verified_years": [
        2005,
        2005
      ],
      "document": {
        "id": "fsm-2005",
        "tier": 1,
        "title": "2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2005,
              2005
            ],
            "engines": [
              "BP-Z3"
            ]
          },
          {
            "gen": "NB",
            "years": [
              2005,
              2005
            ],
            "engines": [
              "BP-Z3-TURBO"
            ],
            "trans": [
              "6MT"
            ]
          }
        ]
      }
    }
  ],
  "jobs": [],
  "system": "fuel-intake",
  "component": "inventory-pass-2026-10",
  "componentName": "Service measurements and fasteners",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/engine-idle-speed-nb2/"
}
```