All combustion engines need three things:  Fuel Air Heat or an ignition source Both glow plugs and spark plugs are the ignition source in a combustion engine. So, what’s the difference? The short answer is that the type of engine they are found in Spark plugs is only found in gasoline engines, and glow plugs are in diesel ones. But why do the two engine types have a different starting process? What do spark plugs and glow plugs do? And how do they fulfil their role to help start your engine? Continue reading to find out. Also, read: NGK VS DENSO – WHICH SPARK PLUG IS THE BETTER CHOICE? HOW TO REPLACE WORN SPARK PLUGS IN A CAR Spark plugs … Continue reading Spark plugs and glow plugs: what’s the difference?