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Glam Journal

Do CNG engines use spark plugs?

Author

Elijah King

Updated on March 08, 2026

Do CNG engines use spark plugs?

Compressed natural gas (CNG) vehicles operate much like gasoline-powered vehicles with spark-ignited internal combustion engines. Finally, the fuel is introduced into the intake manifold or combustion chamber, where it is mixed with air and then compressed and ignited by a spark plug.

When to change spark plugs in CNG car?

Ensure the spark plugs in your cars are meant for CNG cars. It is recommended to replace the spark plugs every 10,000 km.

Does a LPG car need different spark plugs?

In an attempt to correct these two factors, as a general rule we suggest to: Use a spark plug that is one heat range colder than standard to compensate for the increased heat from LPG: The temperature profile of an engine may vary between vehicles. As such a colder plug may be required.

Which spark plug is best for LPG cars?

The ultimate spark plug to use in an LPG engine is the Iridium TT which meets all standard requirements. In the lower cost segment, Nickel TT is the perfect alternative for LPG engines in the place of nickel, the original fitment for petrol engines.

Which spark plug is best for CNG cars?

The combustion temperatures for LPG/CNG also fluctuate more than a petrol engine, thus contributing to reduced service life of up to 30%. Therefore our recommendation is to upgrade to longer DENSO Iridium spark plugs, which improve ignition and engine performance, as well as extend the spark plug replacement interval.

Why CNG vehicles are not popular?

Another essential disadvantage of the CNG cars is its shorter range compared to the diesel and petrol vehicle. The lower fuel range means that you will have to take the car to refilling station more regularly. Additionally, the fuel efficiency of CNG-powered vehicles is also lower than other regular vehicles.

Does CNG damage car engine?

The most common question asked is if using CNG as a fuel reduced an engine’s life. Well, CNG does not reduce a vehicle’s engine life if the kit is factory-fitted and maintained timely. Even after-market sequential CNG kits also make use of ECUs and intelligent injection system that doesn’t affect a vehicle’s engine.

What is the gap for NGK spark plugs?

NGK doesn’t recommend adjusting the plug gap more than . 008″ in either direction. Beyond that slight adjustment, the ground electrode and center electrode won’t align properly, hindering spark plug performance and drastically reducing plug life.

How do you maintain a CNG car?

How To Maintain Your CNG Cars in Best Conditions?

  1. Set auto fuel as your car mode.
  2. Park in covered places.
  3. Clean and replace the air filter.
  4. Clean the throttle body.
  5. Check the spark plugs.
  6. Replace the filter cartridge.
  7. Check the CNG tank.
  8. Check for CNG leak.

What are LPG spark plugs?

They are spark plugs intended for engines using gaseous fuel (LPG,CNG,GPL,METHANE). Their usage eliminates the negative changes that occur when using gaseous fuel, e.g. higher voltage requirement from the ignition system and higher temperature in the combustion chamber.

What is an iridium plug?

Iridium is an extremely durable metallic element, which makes it a great fit as the material for spark plugs. The main property of the iridium spark plugs is that their electrode material comes with a high melting point. They offer a complete combustion and ensure a better performance.

What are disadvantages of CNG?

Disadvantages Of Having CNG In Your Car

  • Decreased Boot Space. CNG Powered Maruti Suzuki WagonR.
  • Decreased Power Output. 1.2-litre engine.
  • Frequent Service Intervals. Engine Oil Check – Basic Car DIYs.
  • Decreased Resale Value. Buying from a private seller.
  • Long Wait For Refuelling. CNG refilling.
  • Hydrotesting.
  • Lack of Knowledge.

How do I set the spark plug gap on my engine?

Spark Plug Gap setting is important for proper engine operation. To set the spark plug gap correctly, you need to use a spark plug gap tool. For reference, see our spark plug gap chart below, this chart converts metric measurements to standard. How to Change Spark Plugs – Spark plug Gap setting and Gap cross reference chart

What is a good spark plug gap for a high compression?

Generally the applications with low cylinder pressures (low compression ratio) running lean A/F (Air/Fuel) mixtures have large recommended gap (around .050″), and applications with high cylinder pressures (high compression, forced induction – turbo, supercharged, nitrous applications ,…) require spark plug gap smaller than .032″.

What do the letters -t mean on spark plugs?

The ” -T ” indicate LGS style spark plug with a Tighter gap than standard LGS style spark plug and should be used on applications where the recommended gap setting is less than .032″., Brisk Extra Turbo Spark Plugs and some others.

Which spark plug part numbers can’t be adjusted?

The exception are for example spark plug part numbers with gap that does not need to be adjusted and can not be changed, such as Brisk Premium Multi-spark plugs, Brisk Premium LGS Spark Plugs, Brisk Premium LGS-T spark plugs, Brisk Extra Turbo Spark Plugs and some others.