Spark plug replacement and gap measurement can be tedious. Measure the gap again and readjust the distance until the desired gap is achieved. Note: Be careful when bending the ground electrode and never adjust it more than. Tip: To decrease the spark plug gap, you can use the tools mentioned above, or you can push the ground electrode against a soft surface, such as a wooden table. To do this, use either a pair of needle nose pliers or a dedicated spark plug gapping tool. To increase the gap, gently bend the ground electrode towards the center electrode. You can adjust the spark plug gap if it was not set correctly. Likewise, if the tool doesn’t fit between the electrodes the gap is too small. If the tool does not touch the electrodes at the appropriate measurement, the gap is too large. Do this by inserting the gauge between the center wire and side terminal or ground electrode. The next step is to measure the spark plug gap. Of course, if the plugs are fouled or exceptionally dirty, they should be replaced instead of cleaned. You can clean the plug contact points with either 90% alcohol or a fine metal brush. This will ensure you get a an accurate reading when setting the gap. However, you’ll want to clean plugs that have been in use for some time. If you are installing new spark plugs, you do not need to do any cleaning. All you have to do is call them with the year, make, model and engine size of your vehicle. Tip: Your local auto parts store should be able to provide you with the information.If the information is not there, you can consult the factory repair manual for your vehicle. You can usually find the information on the emissions decal located on the underside of the vehicle hood. You can find the spark plug gap specifications at several locations on your vehicle. Step 1: Find the gap specifications for your vehicle. Spark plug gap adjusting tool (optional).You can learn to properly gap spark plugs by measuring and adjusting accordingly. On the other hand, if the gap is too large, the supplied voltage may not be sufficient to bridge the gap in the required time.įor this reason, it is essential to check the size of the spark plug gap during spark plug replacement and when trying to diagnose an ignition misfire. The size of the gap affects the spark plug's firing temperature which in turn is related to the combustion of air and fuel in the engine.Ī gap that is too small will cause a low firing voltage resulting in incomplete combustion. The spark plug must be in good condition and must be properly gapped for proper engine performance. It does not store any personal data.The spark plug is used to ignite the air/fuel mixture inside the engine. 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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