A taper cut ground electrode serves a similar function to a cut back ground, fine wire ground and angled ground electrode. Add your valuable comments below. The most common reason that we find is that the spark plug in any of the cylinder has melted. Worn electrodes Its low profile design is resistant to vibration. A low angled ground electrode is shorter and closer to the metal shell and center electrode, providing a faster path to transfer heat away from the ground electrode. remember that the wide band only picks up the integrated O2 ratio of the cylinders, A few cylinders can make a tough vacuum signal, The manifold design can rob other cylinders off the much-required, Do check your cars static compression ratio, a 150-hp shot seen in one system is totally different from the others, Pull out the plugs and inspect them carefully, The car might be either running on lean, or has too much ignition advance, or both together, Or the fuel filter is obstructed, or fuel pump is defective, Place the timing back to about 20 degrees, Replace the plugs if you have to, but check the rea, Most Common and Visible Issues, Top 10 Hidden Crucial Reasons. A “hot” spark plug lengthens the depth of the ceramic which lengthens the distance from the center electrode end of the plug to where it contacts the spark plug shell. Here, let us analyze common issues and find their solutions too. Heat can build up rapidly, and if it has no place to go it's going to do its thing on the air/fuel charge. E3 has taken multiple spark plug design features, such as cut back ground electrodes, sharp edges and surface gaps, and combined them to create a new ground electrode design. When the insulator becomes clogged with carbon, the ignition voltage jumps over to the side electrodes, enabling the plug to operate even under severe conditions. The common reasons are many. Many variations of the surface discharge plug exist, including the semi-surface discharge, intermittent gap, supplementary gap, and surface air gap plug. Pick up some merchandise at: https://lolfit.bigcartel.com Although there are many different cases, if the insulation resistance between the center electrode and the shell is over 10 ohms, the engine can be started normally. A smaller electrode also reduces flame quenching. Copyright © 2020 DRIVING LIFE - This site is owned and operated by LIW LLC, a limited liability company headquartered in California, USA. Spark plug is operating too hot at high speeds. Photo Credit: http://forums.vwvortex.com/showthread.php?6965882-my-engine-melting-the-spark-plugs-2E-engine, Photo Credit: http://www.thesamba.com/vw/forum/viewtopic.php?t=362566. Once the plug has reach operation temperature and the deposits are removed, it returns to "normal" operation, with the spark jumping between the center and main ground electrode. Check to see if the timing is controlled. When the spark discharges, it burns off any carbon build-up. Now it is running the same as before. U-groove spark plugs are a patented design by Denso to improve ignitability and reduce quenching. Some engine designs require the spark plugs have the ground electrode placed to the side of the center electrode rather than below as on a traditional plug. You have tried to replace it twice, and yet the issue continues. Note 1: The standard spark plug types fitted in high-revving, high-output engines are the multi-electrode type that is not so susceptible to electrode breakage and the type with a sparking portion that does not project very far; be sure to use the authorized spark plugs. Ground electrodes come in a variety of shapes and sizes. In an electrode for a spark plug, an elongated blank metal is made of a nickel-based alloy and including a front surface. Topic: Melted plug electrode The car is a 93 Honda Accord with the stock 4 cylinder F22A6 motor. See if the pump is in good condition. A smaller electrode requires less voltage to jump the gap, resulting in fewer misfires, which translates to increased fuel economy and horsepower. Synthetic Oil V/s. For instance when an 8k is maxed rev usually is taken to 75 even if the o2 comes on and you run it too hard. Clean it by spraying your spark plug with brake cleaner, letting it soak for about 10 minutes, then wiping it with a clean cloth. A yellow glaze on the spark plug’s electrode and the tip can inhibit conductivity, keeping the spark from being able to jump the gap. Bosch Super Plus Spark Plugs also have factory-set gaps. I'd be watching the exhaust like a hawk for any signs of black smoke and listening for any sounds of detonation during the dyno pull. I pulled the spark plugs on the shore, and the middle cylinder spark plug electrode seemed melted to the center electrode with no gap! I then pulled the spark plug and it was melted. The nickel on the sparkplug doesn't melt until 2600 degrees.. LIW LLC is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. How To Solve 2000 Dodge Dakota Transmission Problems? Read this crucial post to find the real reasons behind the melted car plug. An electrode for a spark plug as recited in claim 2, wherein the slug is in the form of pellet or powder. Check if your vehicle has any lean spike issue. An electrode for a spark plug as recited in claim 1, wherein, when the slug is melted, a cone-shaped interface is provided between the firing tip and the end surface of the elongated blank metal. A smaller electrode also reduces flame quenching. The U-groove cut in the ground electrode gives room for the spark to grow into a larger flame for greater firing energy and more complete combustion. Most often car owners find that the spark plug in their cars has turned inefficient. However, fundamentally, it is necessary to select a spark plug that matches the … This lowers the spark voltage, secure reliable spark, reduces the quenching effect, and improves ignition performance. Other manufacturers indicate loose plugs can be the cause due to vibration (NGK), also loose plugs tend to damage plug threads, as the thread is the point of electrical connection and loose plugs would experience intermittent grounding. Its low profile design is resistant to vibration. Overheating of the plug causes the center electrode to expand, and this can break the insulation. You can try adding a tr-9 plug to the car. The increase of available edge-to-edge surface area encourages a more rapid spark discharge while also reducing quenching and shadowing. Save Share. For instance, due to ignition being too far advanced, combustion deposits in the combustion chamber, defective values, defective ignition distributor, poor-quality fuel. 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