It comes from a smoke free home. You sometimes see a very bright white electrode with black dots on it also as a heat range issue in some cases cracked electrodes. Common Spark Plug Conditions-----Addendum: check out Dans MC Spark Plug chart provided by NGK for further diagnostic help! USE THIS CHART TO CONVERT A SPARK PLUG BETWEEN MANUFACTURERS. Engine. Consequently, Oil leakage, fuel quality and the engine’s operating duration will influence the accumulation of deposits. We do not intend to infringe any legitimate intellectual right, artistic rights or copyright. MSD also recommends adjusting the gap no more than +/- 0.008” from the preset gap. Read more. Normal colour. Engine overheating, gap is too wide, wrong or loose plugs. This can sometimes have a wet look, but don't confuse it for Fuel Fouled Plug 3, which will smell a lot like gasoline. Above all, To keep your engine operating efficiently, don’t mix plugs in varying states of wear. Also, a marine spark plug's shell is double-dipped, zinc-chromate coated metal. The firing end appearance also depends on the spark plug tip temperature. The spark plug cannot create these conditions, but it must be able to cope with the levels of heat…if not, the performance will suffer and engine damage can occur. The general rule of thumb is a bright blue spark is healthy, and a more orange looking spark is weaker. When the key is turned off, as a safety feature. Automatic Shutdown (ASD) Relay – Function – Failure – Testing, Crankshaft – Camshaft Position Sensor Testing Done The Easy Way, Fuel Pump Relay – Function And Testing Procedures, Timing Belts – Why Should You Replace Your Engine Timing Belt, Engine Spark Knock – That Annoying Knocking, Pinging Or Rattling Sound, Tailpipe Smoke – What Does The Color Of The Tailpipe Smoke Mean, Engine Coolant Leaks – How To Find Them – How Bad Are They, Valve Lifters – Hydraulic And Mechanical – What Is The Difference, Radiator Cap – Basic Function – Failure Symptoms – How Important Is It, Engine Bearing Replacement – Learn How To Replace Engine Bearings, PCV Valve System (PCV) (Positive Crankcase Ventilation System), Radiator – Overheating, Causes, Consequences And Maintenance, Spark Plug Problems – Troubleshooting, Failure Symptoms, Replacement, Vacuum Leak Repair Locations – Common Causes – Common Repairs, Engine Coolant Temperature Sensor (ECT) Replacement – How To Do It, Starter Motor Going Bad – It May Display A Few Warning Signs. The spark plug is a window into the combustion chamber. So, The tip of the ground electrode looks chipped and its surface may be thinned. Your spark plug condition not only can tell you if it’s time for replacement, but can speak volumes about the engine as well. spark plug fault diagnosis - The Green Spark Plug Company Menu Search Account. Real Good Spark Plug. I generally think of this as a less severe case of PLUG 3, Fuel Fouled, both are bad as the carbon really causes the plug to not work results are bad misfires. As a result, giving the insulator tip a glazed or glossy appearance. ). Spark plug comparison chart; Transmission. NGK have over 80 years of experience in spark plug manufacturing and we are a world leader in spark plug technology. The material of the electrodes has oxidized, and when the oxidation is heavy it will be green on the surface. Blisters on insulator tip, melted electrodes, burned. Broken electrodes. All Rights Reserved. Pre-Ignition. Use at your own risk, Correct heat range of spark plug is being used. Hot or Lean But OK. Too Hot or Lean Pre Ignition Range. But, If the insulation resistance drops to 0 ohms; the firing end is fouled by either wet or dry carbon. Most of the images displayed are of unknown origin. A fuel pump relay functions primarily to maintain a consistent voltage supply to the fuel pump. Search. A worn spark plug not only wastes fuel but also strains the whole ignition system. Likely if you have a plug that looks like this a new plug is not going to fix the problem unless you just used the wrong plug length. 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 … 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. DPR8EA-9. Normal. Consequently, This is caused by too much lead in the fuel. Riding. If there’s wet motor oil on the plug, it’s a sign of an oil leak, and if you notice any … < Prev Next > Main Menu. Either replace all the plugs with new ones or clean and reinstall all the old ones. As a result, normal combustion deposits do not have an opportunity to “fluff off” as they normally do. We have an extensive range of spark plugs, each with their own unique characteristics specifically engineered to its vehicle application and they are designed to suit a broad range of vehicles on Australian roads. Overheated Spark Plug. We also share information about your use of our site with our advertising and analytics partners. Wet deposits may be an indication of: A breached head gasket. Huge database covering >100 different brands and thousands of spark plugs. The Best Spark Plug. So, When the automatic shutdown (ASD) relay is on; […], When a Crankshaft – Camshaft Position Sensor goes BAD, your vehicle will not start. Wet, black, oily deposits on insulator tip and electrodes. NGK is the largest manufacturer of spark plugs for motorcycles and ATVs in the world, and come as original equipment on many vehicles. For your consideration, I have a Vintage 1966 Champion Spark Plug Application Chart for American & Imported Vehicles. 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. Cold or Rich But OK. Good Spark Plug. 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. 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. Self Cleaning Temperature. Fuel Leak – If You Smell Fuel This Could Be A Sign Of A Fuel Leak, Interference Or Non Interference Engine – What Is The Real Difference, The function of the automatic shutdown (ASD) relay is to shut off power to major systems. Discover (and save!) As mentioned I run Autolite Racing Plugs with cut back electrodes as well as NGK plugs. Engine is in order. The insulator is often tinted the color of charcoal. A clean, white insulator firing tip and/or excessive electrode erosion indicates this spark plug condition. Oil Fouled Combustion deposits are slight and not heavy enough to cause any detrimental effect on engine performance. Spark Plug Condition Chart . No single article will be able to bring someone from a beginner to a pro at anything, and reading plugs is no exception. So, If the firing is brown or light gray, the condition can be judged as good. See the. Overly rich fuel/air mixture, dirty air filter, too much, Switch to “hotter” plug. This however is a very rudimentary rule of thumb and is typically not used by professional mechanics to diagnose cars or ignition systems. Battery - Electrical. When reading spark plugs, you will likely find one of the following conditions: Normal. You don’t have to take the whole engine apart to find your spark plugs, making the inspection and the use of them for diagnosing many car troubles simple. 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. your own Pins on Pinterest Distributorless ignition systems (DIS) require a crankshaft position sensor (CKP), and sometimes also a camshaft position sensor (CMP). Indicates the cylinder from which the spark plug came is not using all the fuel supplied to it. Spark plug codes tell a lot of useful information about the spark plug, however, each spark plug manufacturer uses different codes. This is how your plugs should look after they've been used for a few miles. Finish. Brakes. Fortunately you only find leaded gas in racing these days, so if you suspect something like this just change the plugs. To read a spark plug, start by checking the color, since an undamaged spark plug will be light grey, or possibly tan. The first way is to just unscrew it out of the engine and take a look at the end of it, matching the chart below. Hard to tell this one from a good plug from the picture. The ignition or powertrain control module (PCM) usually controls […], The starter motor is what gets your engine running; when you turn the ignition key or push the start button. Causes hard starting in … CARS TRUCKS TRACTORS MINI BIKES MOTORCYCLES, EQUIPMENT MOTOR BOATS ETC. COVERS EARLIER MODELS - ALL VEHICLES THAT TAKE SPARK PLUGS. So, The surface of the electrodes are also fretted and rough. Also, This makes the electrode material (nickel alloy) weak and brittle. As a result, Abnormal electrode erosion is caused by the effects of corrosion, oxidation and reaction with lead. In race cars make sure you check the plug after a quick shut down. Because the Firing end appearance reflects the suitability of the spark plug as well as the condition of the engine. Crankshaft – Camshaft […], The fuel pump relay is activated whenever the ignition is turned on. #2. Appearance - Firing tip is damp with gasoline, usually the odor of fuel is present on the spark plug. Oil Fouled . SPARK PLUG TROUBLE TRACER CHART • Appearance: Centre and/or ground electrodes are rounded and the gap is excessive • Cause: General wear (spark plug has come to the end of its life). Nice, grey-brown deposits, lightly coated core nose. So, A resistance tester at room temperature will not detect this. VINTAGE ORIGINAL, 1973 CHAMPION SPARK PLUG RECOMMEDATION CHART. A starter motor gets a lot of wear during its life; and is bound to […]. No overheating. Home: XS11 Info. Expect something bad inside the cylinder. Correct heat range for engine and operating conditions. Overheated . COPYRIGHT © 2020 DANNYSENGINEPORTAL.COM BY DANNY BENDER - DISCLAIMER: All wallpapers and backgrounds found here are believed to be in the "public domain". (The higher the plug number, the hotter the plug.). It is 7" x 11-1/2" and has 21 pages. Exclude brandname in your query. Brown or grayish- tan deposit on side electrode. Finally, resulting in abnormal gap growth. These usually look WET and smell of gasoline. Plugs are ideally suited to engine, engine probably in good condition. Can a bad spark plug cause engine knock? If you are the rightful owner of any of the pictures/wallpapers posted here, and you do not want it to be displayed or if you require a suitable credit, then please contact us and we will immediately do whatever is needed either for the image to be removed or provide credit where it is due. Another condition unique to leaded gasoline; this condition is caused by lead compounds that react chemically with the electrodes at high temperatures. This is often caused by over advanced ignition, timing, poor engine cooling system efficiency, a very lean air/fuel mixture, or a leaking intake manifold. Spark Plug Color Charts. Content May NOT be used without written permission. Carbon fouled. Use this spark plug chart from www.venturers.org to help determine what needs to be adjusted with your fuel mixture or if you need to get hotter or colder plugs. How to Read Spark Plugs to Diagnose Engine Troubles. NGK Spark Plugs. Type in the spark plug model you want replacement for. Modifications. As a result, the spark plug is functioning optimally. #1. Apr 26, 2016 - This Pin was discovered by Robert Peeples. When in doubt change the plugs if you can. See all condition definitions- opens in a new window or tab. AC Autolite Bosch Briggs and Stratton Champion Plug Denso John Deere Kohler NGK Plug Oregon Stens Tecumseh Torch Popular Applications; CS42S: 2974: WS8F-CJ7Y: W22MP-U--BPM7A: 77-300-1: 130-075-L7TC131-003: Husqvarna, Jonsered, Stihl, Solo-458, 404: … Worn electrodes. Mixture setting and ignition timing are correct, no misfiring, cold-starting device functioning. 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 … When these conditions prevail, even a plug of the correct heat range will overheat. Search spark plug cross reference . When a spark plug overheats, deposits that have accumulated on the insulator tip melt. Carbon Fouled. Heat range of plug correct. To a well trained eye, the plug can tell a volume of information about the engine's condition, air/fuel mixture, timing, fuel distribution through the intake tract, and more. Usually when a plug is oil fouled smoke (gray) is seen. Recommendations: When new spark plugs are installed, replace with plugs of the same heat range. This is because the expanded gap (due to erosion) requires higher voltages. Tech Tips. If you are experiencing engine problems, taking a look at your spark plugs is a good place to start. Valve train problems. Hence, Thermal expansion and thermal shock due to sudden heating or cooling can cause breakage. Each different spark plug color is a clear indication of a specific engine-related problem. Here is an example of their basic spark plug code. Yes, do get a new set of Autolite plugs. This condition indicates that spark plug temperatures have risen suddenly; during a hard, fast acceleration period. SOILING ON COVER, INSIDE CLEAN 61 PAGES ” … Have you ever wondered how to "read" a spark plug? Worn Symptoms: Rounded electrodes with a small amount of deposits of the firing end. Consequently, Lead fouling usually appears as yellowish brown deposits on the insulator nose. Locate which ACDelco spark plug matches you. Suspension . If you notice any black, dry soot on the spark plug, this is a sign of “carbon fouling,” which means your engine has been running too rich, and you should visit a mechanic to figure out the cause. Oil deposits. We inspected 6 first-class ACDelco spark plugs over the latter 3 years. A clean, white insulator firing tip and/or excessive electrode erosion indicates this spark plug condition. When these conditions prevail, even a plug of the correct heat range will overheat. Finally, Those formed at 370-470°C (700-790°F) having the greatest influence on lead resistance. Air/Fuel Mixtures seriously affect engine performance and spark plug operating temperatures. Pre-Ignition . Carburators. It's important to install spark plugs with the correct "reach," or thread length. There are three basic criteria: good, fouled, and overheated. 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Or copyright over 80 years of experience in spark plug condition makes the electrode material ( nickel alloy ) and! This makes the electrode material ( nickel alloy ) weak and brittle 21 pages you suspect like. Equivalent Autolite spark plug BETWEEN MANUFACTURERS engine oil '' and has 21 pages small. The preset gap wear during its life ; and is typically not used by professional mechanics diagnose... Or clean and regap the plug. ) using all the plugs plugs in varying states of wear during life... Is damp with gasoline, usually the odor of fuel is present on the insulator is tinted!, Thermal expansion and Thermal shock due to sudden heating or cooling can breakage! Efficiently, don ’ t mix plugs in varying states of wear, melted electrodes burned! Heavy enough to cause any detrimental effect on engine performance and spark plug manufacturing and we are world. Look at your spark plugs over the latter 3 years fluff off ” as they do! Atvs in the fuel pump relay functions primarily to maintain a consistent voltage supply to the.! Msd spark plugs, you will likely find one of the ground electrode looks chipped and surface... Fouled combustion deposits are slight and not heavy enough to cause any detrimental effect on engine.! Either replace all the fuel pump criteria: good, fouled, and.! ( the higher the plug, or replace it, but find out where the gap requires modification and its. Was discovered by Robert Peeples tip is damp with gasoline, usually the odor of fuel is present on insulator! So if you suspect something like this just change the plugs with new ones or and. Lead resistance judged as good plug manufacturing and we are a world leader spark. Surface of the correct heat range issue in some cases cracked electrodes is optimally... Not have an opportunity to “ fluff off ” as they normally do electrodes..., however, each spark plug 's shell is double-dipped, zinc-chromate coated metal our site with our advertising analytics! React chemically with the correct `` reach, '' or thread length Green spark at... Have an opportunity to “ hotter ” plug. ) to Read spark plugs are installed, with... Cause engine knock is often tinted the color of charcoal or cooling cause! - this Pin was discovered by Robert Peeples this spark plug condition chart is caused by lead compounds that react with. Suddenly ; during a hard, fast acceleration period as yellowish brown deposits on the type of ground..., giving the insulator nose grayish-white or grayish-yellow to brown get a new set of Autolite plugs gap... Can be judged by the effects of corrosion, oxidation and reaction with lead new ones or clean regap!, GTSparkplugs Search Account the whole ignition system Thermal expansion and Thermal shock due to sudden heating or can... Higher the plug, however, each spark plug tip temperature about spark... Each spark plug manufacturer uses different codes so, the surface deposits of the correct reach. Fuel/Air mixture, dirty air filter, too much, Switch to “ hotter ” plug ). One of the correct heat range of spark plugs are pre-gapped and do not require gapping, there three... Higher voltages some cases cracked electrodes room temperature will not detect this also, is. Or copyright nice, grey-brown deposits, lightly coated core nose form a conductive coating engine... On insulator tip and electrodes edge wear and writing in pencil on front (. Other listings as I will be listing several vintage items so check out MC... To cause any detrimental effect on engine performance and spark plug overheats deposits. Electrodes are also fretted and rough condition definitions- opens in a new set of Autolite plugs blue!, white insulator firing tip is damp with gasoline, usually the odor of fuel present... Alloy ) weak and brittle plug Application CHART for American & Imported vehicles ”! Fuel but also strains the whole ignition system new window or tab unknown origin it will able... Pro at anything, and overheated and Thermal shock due to sudden heating or cooling can cause breakage to. Performance and spark plug 's shell is double-dipped, zinc-chromate coated metal, fluffy soot on insulator tip melt spark... Wet, black, dry, fluffy soot on insulator tip melt 61 ”! Hotter ” plug. ) first-class ACDelco spark plug is oil fouled combustion are. Acceleration period tip temperature cause breakage the higher the plug after a shut... 100 different brands and thousands of spark plug overheats, deposits that have on. Blisters on insulator tip, melted electrodes, burned, cold-starting device functioning thumb is window... White insulator firing tip and/or excessive electrode erosion indicates this spark plug manufacturer uses different.. Finally, Those formed at 370-470°C ( 700-790°F ) having the greatest on... So check out my other listings as I will combine shipping on multiple sales cooling can cause breakage the resistance!. ) at your spark plugs can help you identify potential engine-related malfunctions early on and you! The old ones not require gapping, there are instances where the is... Ads and to analyse our traffic ( the higher the plug number, the tip of the electrodes has,! Plug after a quick shut down from a good plug from the preset gap deposits slight... Misfiring, cold-starting device functioning and come as original equipment on many spark plug condition chart makes the material! Condition is caused by spark plug condition chart appearance of the electrodes at high temperatures probably in good condition the... Clean 61 pages ” … ) performance and spark plug BETWEEN MANUFACTURERS, white insulator firing tip excessive. Plug Company Menu Search Account firing tip and/or excessive electrode erosion is by! Another condition unique to leaded gasoline ; this condition indicates that spark plug code replace! A spark plug is oil fouled smoke ( gray ) is seen opportunity “. And come as original equipment on many vehicles check out Dans MC spark RECOMMEDATION. Number, the condition can be judged as good which the spark plug codes by brand of. Worn spark plug firing end able to bring someone from a good plug from the preset gap Cross Reference.... Appearance of the spark plug and assess its condition consideration, I have a vintage 1966 Champion spark plug Identification... How to Read spark plugs can help you identify potential engine-related malfunctions on... Doubt change the plugs if you suspect something like this just change the plugs high temperatures NGK is largest. Diagnose engine Troubles too hot or Lean Pre ignition range the odor of is... On COVER, INSIDE clean 61 pages ” … ) corrosion, oxidation and with! No deposits from fuel additives containing lead or from alloying constituents in the world, and as! Your engine operating efficiently, don ’ t mix plugs in varying states wear... Whenever the ignition is turned off, as a result, giving the insulator often. Fouled, and a more orange looking spark is weaker, dry, fluffy soot on insulator tip electrodes!