It’s completely normal for a used spark plug to have signs of brown or grey staining however if you notice that the plug is wet, has physical damage such as broken or bent parts or signs of rust and corrosion then it’s highly likely that the plug is no good. When examining a spark plug you’re going to want to assess the condition of the firing end.
#Signs of bad spark plugs how to#
Learning how to read a spark plug and knowing what to look for can greatly assist with this process. One of the best ways to diagnose a bad spark plug is to pull it out of the socket and visually inspect it for any damage or wear that could be effecting its performance. Physical Wear And Damage To The Spark Plug It is also important to note that if you see liquid coming out of the exhaust that it could also be water from the condensation build up so be sure to analyze further. If this is the case you may actually see liquid leaking out of the exhaust pipe and may also notice a strong gas smell in the air. When you have a spark plug that’s failing to ignite, the fuel that isn’t combusted can then sent through the exhaust system and out the end of the pipe. With an intermittent spark the spark plug fails to ignite the fuel air mixture which then gets forced out of the cylinder on compression into the exhaust headers where it combusts under the heat, this is what causes the loud popping sound you’ll hear out of the exhaust.Ī Strong Gas Smell Or Leaking Gas Out Of The ExhaustĪnother sign to look out for is a strong gas smell or leaking gas out of the exhaust pipe. A bad spark plug can lead to engine backfiring if it’s failing to spark occasionally, this is also known as an Intermittent Spark. Engine BackfiringĮngine backfiring can be diagnosed as loud pops or bags coming from the exhaust when you apply the throttle. If you have a spark plug that isn’t arcing properly to ignite the fuel/air mixture then this could result in a misfire.Īll though a bad spark plug is common culprit for engine misfiring this doesn’t automatically mean that the spark plug is the cause, other problems such as an imbalance in the fuel and air mixture as well as compression issues can all result in engine misfiring. Engine misfiring occurs when one of your motorcycles cylinders doesn’t fire resulting in an out of rhythm output from the engine which you’ll feel when you apply throttle. One of the easiest ways to tell you have a bad spark plug is if you notice engine misfiring. Signs Of A Bad Spark Plug Engine Misfiring How Long Does A Motorcycle Spark Plug Last?.Physical Wear And Damage To The Spark Plug.A Strong Gas Smell Or Leaking Gas Out Of The Exhaust.The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly.
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