Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSACURA1999NSX V6-3.2L DOHC (VTEC)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMSPARK PLUGTESTING AND INSPECTION
1999 Acura NSX V6-3.2L DOHC (VTEC)
Spark Plug: Testing and Inspection
1999 Acura NSX V6-3.2L DOHC (VTEC)SECTION Testing and Inspection
Spark Plug Inspection:
1. Inspect the electrodes and ceramic insulator for:
Burned or worn electrodes may be caused by:
- Advanced ignition timing
- Loose spark plug
- Plug heat range too hot
- Insufficient cooling
Fouled plug may be caused by:
- Retarded ignition timing
- Oil in combustion chamber
- Incorrect spark plug gap
- Plug heat range too cold
- Excessive idling/low speed running
- Clogged air cleaner element
- Deteriorated ignition coil
2. Replace the plug if it is fouled or worn. Do not use spark plugs other than those listed below.
Spark Plug:
PFR6L-11 (NGK)
PK20PR-L11 (DENSO)
3. Make sure that the 1.3 mm (0.051 in) plug gauge does not go into the gap for the platinum tip plug. If the gauge goes into the gap, do not attempt to adjust the side electrode; replace the plug with a new one.
Spark Plug Inspection:
Electrode Gap
4. Apply a small quantity of anti-seize compound to the plug threads before installing each plug. Screw the plugs into the cylinder head finger-tight, then torque them to 18 N.m (1.8 kgf.m, 13 lbf.ft).
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.