![]() ![]() Removed the Tool Aid 36350 because it includes noid lights which are used to test injectors in the fuel system.ĭuring a no-start problem with internal combustion engines, if the engine cranks at all, then the problem is narrowed down to either a fuel delivery issue, no spark in the combustion chamber, or a compression problem. Removed the Performance Tool 84800 because it is essentially a clone of the Lisle 20700. Otherwise, all our choices remain the same. In its place came the Tool Aid 36350, which is costly, but allows home and working mechanics to use it easily on almost any make or model of vehicle. The major changes we made this time around include the removal of the ABN Automotive 4269 due to reliability and availability issues. The primary difference between them all is their shape and size, which can affect exactly which vehicles they work with. They're not terribly expensive, although there are a few different styles. Many of these spark checkers, or ones very, very similar to them, have made the rounds in amateur and pro toolboxes for years. We have done the research and put in the hours to enhance the performance, durability, and ignitability of plugs for domestic and import engines.Įxplore the benefits of our most advanced products like our iridium spark plugs at complicated as cars get, most still run exclusively on fuel, air, and spark. Iridium Ultra® plugs feature a laser-welded iridium finewire center electrode for optimal fuel efficiency, acceleration, and focused ignitability for long-lasting performance.Īutolite ® has been focused on developing spark plugs for over 85 years. When it comes to iridium spark plugs, the wire loop gauge is the recommended gapping tool.Ĭhecking the plug gap is one of the most critical steps in using the right ignition products for your needs.Īutolite Iridium Ultra ® Spark Plugs are the highest performance offering from Autolite ® and provide the same precision and reliability of an engineered OE replacement plug. Wire loop gauges work by measuring the gap, then allowing you to gently bend the electrode with its built-in hooks if needed, and then re-measure until the gap is correct. Wire loop gauges reduce the risk of damage to the plug when used correctly. ![]() For this reason, it started to become clear that a more precise, advanced gapping tool is better suited for high-quality spark plugs. Feeler gauges or coin-style (also called ramp-style) gauges have long been used but can increase the risk of damaging the electrode. Gapping gauges have evolved just as spark plug metallurgy has. To avoid this, the gap should only be checked with the right tool. This is especially true for iridium spark plugs.Īlthough they are designed to deliver more than 100,000 miles of reliable ignition, improper gapping can easily damage iridium plugs. Today’s spark plugs are precision-built parts, which means adjusting them from their original factory settings will alter their performance. The Right Tool to Gap Advanced Spark Plugs If either of these happens, engine combustibility will be incorrect. If it’s too big, the coil will need too much voltage to fire. ![]() If the gap is too small, the flame kernel will not be able to properly expand. ![]() Since gap distances are as small as a tenth of a millimeter, or four one-thousandths of an inch, it’s crucial to take extra care when checking or setting the gap in each plug. The correct gap allows the engine to fire on all cylinders, while the wrong gap will not create proper ignition or engine performance, regardless of vehicle.ĭrivers should always check their vehicle’s service manual to get the correct gap information. Setting the correct gap is one of the most important details of installing new spark plugs. ![]()
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