NGK LPG4 Spark Plug - Copper Core

NGK LPG4 Spark Plugs. This spark plug set of 4 is designed for the MAZDA 121 Mk3 1.25, manufacture...

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Product Information

Full details

The NGK LPG4 Spark Plug is designed for MAZDA 121 Mk3 1.25 models (1996-2003) running on CNG/LPG fuel. It offers reliable ignition with its copper core and iridium middle electrode, ensuring efficient combustion. A key benefit is its suitability for alternative fuels, maintaining engine performance. However, it requires replacement every 60,000 km, which is more frequent than some standard spark plugs.

All features

Model Part NumberLPG4
BrandNGK

Extended Product Information

FAQs

What vehicles are the NGK LPG4 spark plugs compatible with?

These spark plugs are specifically designed for the MAZDA 121 Mk3 1.25 manufactured between 1996 and 2003, and intended for use with CNG/LPG fuel systems.

What is the recommended replacement interval for these spark plugs?

NGK recommends replacing these spark plugs every 60,000 kilometers to maintain optimal performance.

Can I use these spark plugs in a gasoline-only vehicle?

While the physical dimensions may match, these spark plugs are optimized for the combustion characteristics of CNG/LPG. Using them in a gasoline-only vehicle may not provide optimal performance or longevity compared to a standard gasoline spark plug.

What are the main benefits of using iridium electrodes?

Iridium electrodes offer superior ignitability, require less voltage to spark, and are highly resistant to erosion, leading to longer lifespan and more consistent performance.

What is the thread size and spanner size for these plugs?

The thread size is M14 x 1.25, and the required spanner size is 16 mm.

How do I know if my spark plugs need replacing?

Symptoms include rough idling, misfires, decreased fuel economy, difficulty starting, and a general loss of engine power. Visual inspection may also reveal wear or fouling.

Troubleshooting

Engine misfires or runs rough on LPG/CNG

Ensure the spark plugs are the correct NGK LPG4 model for your vehicle and fuel type. Check for proper installation and torque. Consider replacing the spark plugs if they are beyond the 60,000 km recommended interval.

Difficulty starting the engine

Verify that all spark plug wires or coils are securely connected. Check the condition of the spark plugs themselves; worn or fouled plugs can hinder starting. Ensure the fuel system is functioning correctly.

Reduced fuel economy

Worn spark plugs can impact fuel efficiency. Replace the NGK LPG4 plugs at the recommended 60,000 km interval. Also, ensure your LPG/CNG conversion system is properly calibrated.

Pros and Cons

Pros

  • Optimized for CNG/LPG fuels, ensuring proper combustion and performance.
  • Durable construction with a copper core and iridium electrode for extended life within its recommended interval.
  • Precise fitment for MAZDA 121 Mk3 1.25 models, ensuring compatibility.
  • Enhances ignition efficiency for cleaner emissions and smoother engine operation on alternative fuels.

Cons

  • Requires replacement every 60,000 km, which may be more frequent than some standard spark plugs.
  • Only suitable for specific MAZDA 121 Mk3 1.25 models, limiting broader application.
  • Performance may differ from standard gasoline spark plugs if not properly matched to the engine's fuel system.

Setup, Compatibility & Care

Compatibility: This NGK LPG4 spark plug set is specifically designed for the MAZDA 121 Mk3 1.25, manufactured between 1996 and 2003, and intended for use with CNG/LPG fuel systems.

Setup:

  1. Ensure the engine is cool before starting.
  2. Locate the spark plug access points.
  3. Using the correct size spanner (16 mm), carefully remove the old spark plugs.
  4. Thread the new NGK LPG4 spark plugs in by hand to avoid cross-threading.
  5. Tighten the spark plugs using a torque wrench to the manufacturer's specified torque for your vehicle. Do not overtighten.
  6. Reconnect ignition wires or coils.

Care: These spark plugs are designed for performance on specific fuel types and do not require regular maintenance beyond timely replacement. Inspecting them during routine maintenance is advised. Always refer to your vehicle's service manual for specific torque settings and procedures.

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