LPG Spark Plugs
LPG SPARK PLUGS
Fitting the Correct Spark Plugs for LPG & CNG
Check to see what spark plugs you have fitted in your vehicle, if you have platinum or Iridium tipped spark plugs fitted they are No good for LPG or CNG there is No such thing as an iridium or platinum LPG spark plugs! we recommend you replace them with Genuine LPG / CNG spark plugs. NGK Plugs are made for LPG / CNG & Petrol they have high quality electrodes to produce a superior spark. Nickel, Platinum & Iridium are very poor, we also recommend in most cases when fitting the NGK single silver electrode spark plugs you keep to the manufactures recommended spark plug gaps or reduce them by only 0.1 mm you will note below most recommended gap are listed for the vehicles & models so you can check & adjust them, NGK spark plugs are specially designed spark plugs which produce incredible spark across a 2.9 mm gap - yes 2.9 mm gaps theses cannot & do not need any adjustment they are ready to fit.
Do Spark Plugs make a Difference?
Yes - Vehicles fitted with Poor Quality spark plugs produce a weak spark, to ignite a fuel with a weaker spark the engine requires a much richer fuel mixture - Yes you will use more fuel even petrol, when running a vehicle on LPG or CNG you need a much stronger spark as LPG & CNG is a dry fuel it is harder to ignite or you need a much richer fuel mixture! most vehicles are fitted with a lambda control systems like petrol injection vehicles which correct the mixture by monitoring the exhaust emissions this can lead to a problem with weak spark plugs un burnt LPG or CNG has an affect on the vehicles lambda exhaust probe sensor which makes the sensor read incorrect - weaker than normal, the vehicles Ecu or lambda control system corrects this by increasing the fuel mixture even though the system now thinks the mixture is correct the engine is actually running far to Rich not only is this increasing your fuel cost with poor fuel economy it has increasing the exhaust emissions CO & HC, this also has an increased affect on the engine & exhaust temperature which can damage the catalytic converter.
Common symptoms of weak spark plugs
Poor Fuel Economy, Misfires, Poor idle, Stalling, Hesitation under load or Jerking, Less Power / Performance in some cases un drivable on Lpg or Cng, Back fires, Engine management light on?
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