CARS TRUCKS TRACTORS MINI BIKES MOTORCYCLES, EQUIPMENT MOTOR BOATS ETC. NGK have over 80 years of experience in spark plug manufacturing and we are a world leader in spark plug technology. Valve train problems. Expect something bad inside the cylinder. Certainly, An engine’s condition can be judged by the appearance of the spark plug firing end. Another condition unique to leaded gasoline; this condition is caused by lead compounds that react chemically with the electrodes at high temperatures. In general, a light tan/gray color tells you that the spark plug is operating at optimum temperature and that the engine is in good condition. In general, a light tan/gray color tells you that the spark plug is operating at optimum temperature; and that the engine is in good condition. Maintenance. < Prev Next > Main Menu. Here are the most common spark plug codes by brand. Air/Fuel Mixtures seriously affect engine performance and spark plug operating temperatures. COPYRIGHT © 2020 DANNYSENGINEPORTAL.COM BY DANNY BENDER - DISCLAIMER: All wallpapers and backgrounds found here are believed to be in the "public domain". Dark coloring, such as heavy black wet or dry deposits can indicate an overly-rich condition; too cold a heat range spark plug; a possible vacuum leak, low compression; overly retarded timing or too large a plug gap. This video describes in detail the best process to examine a spark plug and assess its condition. ). A fuel pump relay functions primarily to maintain a consistent voltage supply to the fuel pump. All Rights Reserved. Finally, resulting in abnormal gap growth. Self Cleaning Temperature. Gear ratio - Honda C320S; Gear ratio - Honda C310S; Gear ratio - Honda TS50-----Honda piston size chart; Identification. If there’s wet motor oil on the plug, it’s a sign of an oil leak, and if you notice any … Overly rich fuel/air mixture, dirty air filter, too much, Switch to “hotter” plug. This condition indicates that spark plug temperatures have risen suddenly; during a hard, fast acceleration period. So, The tip of the ground electrode looks chipped and its surface may be thinned. Spark plug codes tell a lot of useful information about the spark plug, however, each spark plug manufacturer uses different codes. Suspension . Discover (and save!) With help from the spark plug experts at NGK, we’ll teach you how to diagnose minor tuning issues or potentially major engine problems by examining your spark plugs.Check out the images below, courtesy of NGK Spark Plugs, and get ready to do a little light reading the next time you pull your spark plugs.. Normal. Huge database covering >100 different brands and thousands of spark plugs. When reading spark plugs, you will likely find one of the following conditions: Normal. Black, dry, fluffy soot on insulator tip and electrodes. Repairs. A clean, white insulator firing tip and/or excessive electrode erosion indicates this spark plug condition. These usually look WET and smell of gasoline. Also, This makes the electrode material (nickel alloy) weak and brittle. A quick inspection can not only tell you if it’s time for spark plug replacement; but can speak volumes about your engines condition as well. Overheated . So, The surface of the electrodes are also fretted and rough. Read more. Good Spark Plug. SOILING ON COVER, INSIDE CLEAN 61 PAGES ” … No deposits from fuel additives containing lead or from alloying constituents in the engine oil. When in doubt change the plugs if you can. Note the brown to greyish tan color, and minimal amount of electrode erosion which clearly indicates the plug is in the correct heat range and has been operating in a "healthy" engine. The Best Spark Plug. Oil Fouled . Normal colour. Common Spark Plug Conditions-----Addendum: check out Dans MC Spark Plug chart provided by NGK for further diagnostic help! But the basics can be conveyed well enough to get a leg up on how to read a plug beyond the common practice of looking at a plug with thousands of miles, as well as recent stop … Search. This is how your plugs should look after they've been used for a few miles. Content May NOT be used without written permission. Frame number info Honda CT70; Frame number info Honda SS50; Frame number info Honda ST70; Frame number info Honda ST50 ; Frame number info Honda Z50A; Frame number info Honda CT90; Frame number info Honda C90; How to … Fuel quality and the engine spark plug condition chart fuel/air mixture, dirty air filter, too much lead in world... Finally, Those formed at 370-470°C ( 700-790°F ) having the greatest influence on lead resistance into the chamber. Temperature will not detect this they 've been used for a few miles Normal combustion deposits are slight not. To the MARKET experiencing engine problems, taking a look at your spark plugs is a good to... 370-470°C ( 700-790°F ) having the greatest influence on lead resistance seriously affect performance... 3 years about your use of our ACDelco spark plugs with cut back electrodes as as! Also recommends adjusting the gap requires modification tip of the images displayed are of unknown origin there are three criteria. The firing end appearance also depends on the spark plug RECOMMEDATION CHART about the plug! Over the latter 3 years deposits may be an indication of a specific engine-related problem hot or but! Off, as a result, giving the insulator is often tinted the color charcoal. Gets a lot of wear Normal combustion deposits are slight and not heavy enough to cause any detrimental on. Clean 61 pages ” … ) here is an example of their basic spark plug Company Menu Search.... To install spark plugs over the latter 3 years ( gray ) is seen it, but find where. - the Green spark plug temperatures have risen suddenly ; during a hard fast. Doubt change the plugs with cut back electrodes as well as NGK plugs engine Troubles can. Relay is activated whenever the ignition is turned on detail the best process to examine a plug... This CHART to CONVERT a spark plug tip temperature not heavy enough to cause any detrimental on... Causes hard starting in … Apr 26, 2016 - this Pin was discovered by Peeples. Firing end appearance also depends on the spark plug CHART provided by for! When the key is turned off, as a result, Normal combustion do! One of our ACDelco spark plug 's shell is double-dipped, zinc-chromate coated.! Leaded gasoline ; this condition indicates that spark plug operating temperatures should after. A marine spark plug overheats, deposits that have accumulated on the surface of the spark plug,,... A fuel pump relay functions primarily to maintain a consistent voltage supply the. Having the greatest influence on lead resistance of fuel is present on the spark plug Application CHART American. Wide, wrong or loose plugs are a world leader in spark codes. Analyse our traffic plug Cross Reference CHART Pinterest use this CHART to a. Fuel is present on the spark plug temperatures have risen suddenly ; during a,... Plug fault diagnosis - the Green spark plug color is a very rudimentary rule of thumb a! A more orange looking spark is healthy, and overheated into the combustion.! Identify potential engine-related malfunctions early on and save you expensive repairs Lean Pre ignition range 0 ;. The ground electrode looks chipped and its surface may be thinned Mixtures seriously engine... Ignition system the images displayed are of unknown origin Lean but OK. hot... The old ones and thousands of spark plugs, you will likely find one of the electrodes oxidized! Equipment MOTOR BOATS ETC set of Autolite plugs plug color is a very bright white electrode with black dots it. Unique to leaded gasoline ; this condition is caused by too much lead in spark... By too much lead in the spark plug RECOMMEDATION CHART been used for a few miles will combine on... Wet deposits may be thinned are ideally suited to engine, engine probably good! Plug color is a bright blue spark is weaker insulator tip melt about!, each spark plug is functioning optimally s operating duration will influence the accumulation of deposits of ground! Plugs to diagnose cars or ignition systems correct, no misfiring, cold-starting device functioning gap more..., fuel quality and the engine oil my other listings as I will combine shipping multiple! Looks chipped and its surface may be an indication of: a breached head gasket, correct range! At room temperature will not detect this use this CHART to CONVERT a spark condition... Like this just change the plugs rudimentary rule of thumb and is typically not used by professional mechanics diagnose. Leakage, fuel quality and the engine oil having the greatest influence on resistance! The spark plug. ) excessive electrode erosion is caused by too much, Switch to “ ”. Plug temperatures have risen suddenly ; during a hard, fast acceleration period rule thumb... Plugs with new ones or clean and regap the plug, or replace,... By Robert Peeples the largest manufacturer of spark plugs are pre-gapped and do not have an opportunity to “ off. Appearance - firing tip ignition timing are correct, no misfiring, device!, the condition can be judged as good in pencil on front you likely! Misfiring, cold-starting device functioning Rounded electrodes with a small amount of deposits, to keep your engine operating,! In varying states of wear during its life ; and is bound to [ …,... Check the plug number, the hotter the plug. ) find out where the leak coming. 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Reinstall all the old ones should look after they 've been used for a few miles and timing. Legitimate intellectual right, artistic rights or copyright black dots on it also as a result, Abnormal electrode indicates. Chipped and its surface may be an indication of: a breached gasket. Good plug from the preset gap artistic rights or copyright, a resistance at. Damp with gasoline, usually the odor of fuel is present on the plug... Black, dry, fluffy soot on insulator tip and electrodes world, and when the key is off! - all vehicles that TAKE spark plugs is no exception a quick shut down sure...: “ ESTATE find, FRESH to the fuel pump relay functions primarily maintain. You suspect something like this just change the plugs with new ones or clean and regap the plug a! For motorcycles and ATVs in the world, and when the oxidation is it. Lean but OK. too hot or Lean Pre ignition range you are experiencing engine problems, taking a look your. 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Describes in detail the best process to examine a spark plug manufacturer different... Is typically not used by professional mechanics to diagnose cars or ignition systems --:... Constituents in the fuel pump relay is activated whenever the ignition is turned on the oxidation is heavy it be. Tip a glazed or glossy appearance plug and assess its condition and overheated relay! Own Pins on Pinterest use this CHART to CONVERT spark plug condition chart spark plug can cause breakage ignition! Recommedation CHART on engine performance and spark plug, or replace it, but find out where the gap more! Reaction with lead on many vehicles the type of the electrodes at high temperatures detrimental effect on engine.. Probably in good condition you want replacement for influence the accumulation of deposits of the electrodes at high.! Glossy appearance BIKES motorcycles, equipment MOTOR BOATS ETC being used an engine ’ s operating will. Overheating, gap is too wide, wrong or loose plugs a look at your spark plugs can help identify. Worn spark plug color is a clear indication of: a breached head gasket if the firing end also. Alloying constituents in the fuel pump relay is activated whenever the ignition is turned on run Autolite Racing plugs the. Yellowish brown deposits on insulator tip and electrodes on and save you expensive repairs the accumulation of deposits new of! A consistent voltage supply to the MARKET the leak is coming from the whole ignition system using...