More hp , more torque? Given the dangers of the too lean setting, a solution should be found quickly in order to not risk permanent damage to our engine. JavaScript is disabled. Tho, often the petrol consumption is in no relation to the power increase and it is preferred to decrease the amount of petrol in the mixture. If you zoom in on a spark plug’s tip, as we have done in the image above, you can see that there is a central electrode that sticks up and a side electrode that curves around it. Setting the engine up !! I suspect that the plugs weren't torqued right or snug enough, after torquing them again and letting the car idle, it made no difference. Normal gap specifications range between .030 to .060 inch. This should help to get more precise results. It is also possible that you can have carbon deposits on the plug because of dry air filter. Spark plug gap is the distance between the center and side electrodes. The tip continues down as the center electrode through an insulated core composed of a ceramic housing, usually made of porcelain. Tho, often the petrol consumption is in no relation to the power increase and it is preferred to decrease the amount of petrol in the mixture. If you continue to use this site we will assume that you are happy with it. According to NGK Spark Plugs, when the insulator nose of the spark plug is coated, it is considered fouled. Back in the day, cars had a lot of ignition parts that today don’t even exist. Is it the oil? This is a quick way to solve the problem but ultimately we should consider increasing the main jet size to match the amount of air provided by the air intake system. Normal Condition. yard-man.biz. The gap between the two of these determines how hot the spark will be because it affects the amount of electrical potential that is required to overcome the resistance of the air. On my Kymco agility 50 I put a performance transmission kit in,which includes variator rollers,clutch spring clutch housing,also unrestricted boss,no-limit cdi,It is just not performing I would thought.Spark pug it at 0.26in. The center electrode ends in a gold or palladiu… Remove the spark plug and use a wire brush to completely clean the spark plug. Given the explanations above about too lean and too rich setups it is also always a safer approach to go a bit richer with your setting. The spark plug also has a steel jacket, which allows the threaded end of the plug to be torqued into the cylinder head. As a result, the spark plug is functioning optimally. Enter your email address to subscribe and receive notifications of new posts by email. Hey Timothy Seward Anyone can make a mistake so don’t be so objectionable by call the author a DICK. But, if the spark plugs are faulty then you will have incomplete fuel burning. These spark plugs got fouled because the mixture on the carburetor was set way too rich. Give me a ring on 0400 307 166 if you're interested. And a spark plug’s condition can provide tell-tale signs about the condition of your engine. He'd want a small donation for the use of it, but very worthwhile. You might loose some power but you can ensure that your engine won’t be damaged during long full throttle trips under extreme conditions. The gas? Running a tuned scooter requires attention to details. Get involved in the comments, or post to the forum to make this page more fun for everyone. I used the guide from your previous post about carb main jet settings , 34×5=170 … Still feels flat needle setting on the top clip , idle is also rich 50 pilot … My 1st thought is the main jet being rich is causing low end issues do you have a guide to doing idle jet aswell , I’ve turned the mixture screw all the way in and engine is still on does this mean main jet is too big or am I wrong, Also I got a guide with the carb when I bought it and the settings they have give are, 42 slow jet 142 main jet Jet needle setting 3 The carb is a pwk34mm flatslide power jet but I’ve blocked it off. Rich spark plug color. I'd be really cautious about just adjusting the AFM without being sure it's the problem. Suggest you shove your head back up your arse where it belongs. However, lower octane fuels should run hotter in some engines because of a more rapid ignition flame speed. 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. This means there is too much air in the mixture which causes the explosion within the cylinder getting too hot. How about this photo. I found this article looking through search of spark plug conditions. When changing your spark plugs, you may have some difficulty loosening a spark plug for the first time. The spark plug is a great indicator, to see if the carburetor settings are correct. Or just no difference? The Iridium plugs might burn a bit cleaner and it might take a while until you build up some particles on the plug! Spark plugs can be the “canary in the coal mine” for underlying engine issues. If not, then look no further. In order to fix the too rich setting, we need to increase the amount of air in the mixture, OR decrease the amount of petrol added to the mix. If you live on a mountain and take a trip down to the coast you might want to increase your main jet size or tape that air filter before you leave to ensure a pleasant trip. During normal combustion, most of the fuel oxidizes and changes into carbon dioxide and carbon monoxide gas. Oil on spark plugs can mean that there one or more spark plug O rings or the valve cover are leaking. Plus we've listed the electrode gap - not that you should need it, as all plugs these days are gapped to the right thickness. A lean spark plug will have little to no color on the insulator tip. In the worst cases the tip of the plug starts melting away. If your engine runs better whilst it’s cold, doesn’t rev up properly and the exhaust spits unburned oil and petrol, you face a too rich setup. White, no color on spark plug: Too lean. If it feels stuck, try a little spray lubricant. Good running conditions: If everything is good, the spark plug should have a tan/light brown color. 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. Rich running conditions: If your engine is running too rich, the spark plug will be black and sooty. I hope this article helps you checking your spark plug and adjusting your carburetor accordingly. You are using an out of date browser. Let me know in the comments if you have any questions. Whilst you can not damage your engine with a too rich setting, you face a loss of power and increased petrol consumption. A hot plug may be a good option if your spark plugs are fouled from carbon deposits, your engine has a rich air-fuel ratio or burns oil, or if you do a lot of local low-speed driving. Now, ive got a NGK BR9EIX iridium spark plug, and looks like it’s running too lean… WTF? There is a lot more to carburetor adjustment than what I’ve just explained here, tho it should give you a solid start, when tuning tuning your scooter and hopefully helps you to understand the topic a bit better. The left plug looks to be optimal with a grey brown colour from the light deposits of a correctly adjusted mixture. 2-46). If your carburetor setting is too rich, this means that the ratio of petrol to air is too high. The car is running rich, sputters and at times backfires when accelerating. In order to fix the too rich setting, we need to increase the amount of air in the mixture, OR decrease the amount of petrol added to the mix. As I said in another post, Adrian Wuillemin has a new fast acting Uego O2 meter, which will tell you the exact mixtures after a short drive. If the carburetor is set incorrectly you face a power loss at least and in the worst case you can damage your engine. The white color is lean, the tan color is optimal and the black color is rich. If you want to know how to make extra money, search for: best adsense alternative Dracko’s tricks, Thanks for sharing such an informative article. My scooter is running to leaning running it on a 24mm carb 108 main jet it’s fine on tickover but when I take it for a run it looses power top end I’ve put a 150cc big bore on it any suggestions where I’m going wrong? If the spark plugs have a matte black or grey appearance, it could be carbon fouling — something typically caused by a fuel mixture that is too rich. yup pictures are the wrong way around,anything looking white is lean or hot,hopefully not too many people go by the pics. Also, find me on Google+, or Twitter, you need to read this ! Tip of electrodes checks idle mixture adjustment and pilot jet with air screw 1 3/4 to 2 turns out from closed. This is done … Anyway thanks for the article. 2. It had a dud throttle position sensor. Se excluye cualquier tipo de responsabilidad por parte del fabricante por los daños que resultaren de modificaciones arbitrarias realizadas sobre el aparato. Ok sometimes he gets it wrong but don’t be such a “plonker” about it. Grease, sludge, and other junk may have caused the plug to stick in place, especially if it’s been a long time since it was changed. In order to perform the check we should follow the following steps: Now we compare the looks of the spark plug with our reference image. Pretty sure your plug labels are incorrect; the rich one is right but the lean and optimal should be swapped round… a lean mixture increases the heat of combustion and tends to glaze the ceramic of the spark plug and burn off any deposits that may have accumulated, leading to the very white, clean insulator on the right of the picture. Symptoms of running lean are overheating, bogging or loss of power, and delay of returning to idle from higher RPM’s. It’s actually correct. It now has fantastic mixtures after a bit of tweaking of the air flow meter. So, If the firing is brown or light gray, the condition can be judged as good. The optimal one shows a clean insulator, but not burned. If the spark plugs have a matte black or grey appearance, it could be carbon fouling — something typically caused by a fuel mixture that is too rich. Hey Dan! It might be worth checking (with a multimeter again) that the coolant temp sensor for the EFI (not the one for the temp gauge) is working, otherwise the computer can continually think your car is cold, and run rich to compensate. A rich mixture will not cause the engine to overheat, but a weak mixture will, so when adjusting the air screw use very small increments, and check the spark plug color between each adjustment. Especially the carburetor needs to be adjusted when increasing the performance by installing a new cylinder kit, or exhaust pipe. If your carb setting is too rich you will notice oil spillage on the tip of the plug. We've listed the standard plug replacement and the iridium upgrade. I ride the new spark for 5kms and now its chocolate brown, how good it is? I tuned his S1 205GTi with it last week. Also there is a spec,setting,say from .06 mm.-.07 mm.or 24-28 in.I tried in so .either to rich or lean.What is best? Now that we know what to look for, let’s use the spark plug as the main indicator for our carburetor setting. ©2015 TuningMatters.comConcept and Development Daniel-Klose.com, How To Check Your Spark Plug for the Correct Carburetor Setting. you got your spark plug reading all wrong. This plug eventually fouled and the bike would not start. YouTube. The spark plug is the essential thing of a vehicle. Before going into the spark plug check, let’s look at these three categories in detail. or the coolant? The source is telling to read spark plugs based on the burned dimensions on the ground electrode which should be 1.5mm or less and not the color of the ceramic insulator because as you can see, the ceramic insulator color and optimal spark in this case is burned? Welcome to our Triumph spark plug finder. vice versa. This is done by decreasing the size of the main jet. Also remember that air tends to get denser at sea level. Whilst I agree with PP that it’s not easy, I disagree that its not possible. Certainly, An engine’s condition can be judged by the appearance of the spark plug firing end. yard-man.biz. Hi Rider, The manufacturers always try to sell their products at a higher price :) Whilst it is probably true that you see a performance difference in an F1 engine, it is unlikely that there is any measurable or neven noticable difference on a scooter engine :) For how long did you ride the new plug? The spark plug should be replaced. Sorry, I didn't realise 205GTi's had oxygen sensors. I have been building engines for cars, high performance, trucks, semi trucks, motorcycles ect. You described clearly about the maintenance system of it.it will be helpful for us.keep posting like this. please review. Hi daniel, i had a Shitty spark plug on my polini Sport, equivalent with the NGK B9ES, the color of the spark plug was chocolate brown. Shiny black or oily deposits are an indication of bad oil seals and/or piston rings, and are not an indication that the spark plugs are at fault. The optimal carburetor setting is found when the engine performs well in cold state, when the choke is applied and revs up evenly in warm state. According to Holley and other sites your plug pictures are wrong. The plug will also be extremely dry. Hi, I’m Daniel I write this blog and love scooters! We need to decrease the amount of air in our mixture and the quickest way to do so is tape the air box so less air is being added to it. your lean plug is supposed to be optimal.. optimal is brown not white.. you are going to be responsible for blowing up peoples top ends you dick. Yeah dude your picture is wrong…. You must log in or register to reply here. It may not display this or other websites correctly. Whilst the engine usually performs very well in cold state, it often stops suddenly after a few minutes of riding and only turns on again after it cooled down. PP should try to run the engine under full load as described by me and ensure to clean the spark plug between runs. For a better experience, please enable JavaScript in your browser before proceeding. The image below shows a plug off a motorcycle that was running pig rich. Make runs also at 1/2 throttle to check needle position. Keeping strickly to plugs. Immediately stop and remove the spark plug (be careful, it’s hot). The website continues to explain that while carbon fouling can cause problems, if the spark plugs are cleaned, there should not be any problems afterward unless the spark plugs were also damaged. Also, the spark plug might be slightly wet on it’s thread, which causes the spillage around the cylinder head. One of the most common causes of carbon fouling is having a very rich fuel-air mixture. Symptoms include blue exhaust smoke, poor fuel economy and a decrease in engine performance. I know the ECU temp thingy works as it used to light up when I was having over heating issues (the big red STOP light would light up....). You’ll feel better […] new air filter and it is a 2017.I gonna try a 4 gm roller weight.If you have some suggestion,please.I will get a performance ignition coil,and performance exhaust when get more money.Thanks David.it is hard to find performance parts for the kymco agility 50,most are GY6, I have noticed you don’t monetize your page, don’t waste your traffic, you can earn additional bucks every month because you’ve got high quality content. Fire requires three components: oxygen (O2), fuel, and heat.In your engine, every time a cylinder pulls an intake stroke, it pulls in air (≈21% O2).Port-injection engines inject fuel during the intake stroke, while direct-injection engines, gasoline or diesel, might wait until the compression stroke. A black, dry soot may develop on the plug when the engine is running too rich. In some instances, lengthy idling and excessive driving at very low speeds can contribute to carbon-fouled spark plug. You may be able to clean the soot off of the plug and avoid having to replace it. Spark plugs are either resistor or non-resistor types (fig. Hi just a quick one? for over thirty five years. lean is optimal. Hello Daniel , I have a Piaggio typhoon air cooled ,183 highly modified with pm Tuning expansion chamber 55mm crank , 34mm carb rd 350 reed valve , horse power ignition kit ,cylinder has also been heavily modified, ….. Check out how to diagnose and fix this common problem. Spark plugs are critical for providing that essential charge required for combustion. Providing you have the correct heat range plug, base of insulator deep inside is read to check main jet. However, they could cause misfires which will result in a rich mixture when the O2 sensors are not working as they should. I agree, the picture is not optimal, but it’s not wrong. Spark Plug – How Do I Read My Spark Plug Condition – What They Tell You 1. First things first: Have you changed your air filter lately? The carbon will look black and fluffy if it is to rich. Source: iStock. Reinstall the clean spark plug and ride the scooter for about 100-200m under complete load (full throttle), ideally up a hill. If the spark plug is black and oily, they are oil fouled. By simply reading spark plugs for wear and deposits, you can quickly discover whether your spark plugs are either worn out, getting too much gas (rich), too little gas (lean), running too hot (burnt), wet, cracked, and whether it’s time to change them. In the optimal setting the spark plug tip will be slightly wet but clean. Low-octane, as well as high-octane gasoline fuels in a rich mixture leave carbon compound deposits on the spark plug porcelain. Causes can include the engine overheating, incorrect spark plug heat range, a loose spark plug, incorrect ignition timing or too lean of an air/fuel mixture. We can organize the carburetor setup into three categories: Too rich, too lean and optimal. Mine, by your description, were running lean. Lean running conditions: If your engine is running too lean, the spark plug will be white. Lean spark plug color. The spark plug was first developed in 1860 by Etienne Lenoir in his first internal combustion engine, but it wasn’t until the invention of the commercially-viable high voltage spark plug as part of a magneto-style ignition system by engineer Gottlob Honold in 1902 that the development of the internal combustion engine was made possible. If black sooty deposits are present, a too rich fuel mixture is likely ( or the spark plugs' heat range may be too cold for the application). http://www.pedparts.co.uk/blog/introduction-to-moped-jetting#moped-plug-chop, How To Quickly Determine The (Dell’Orto) Carburetor Main Jet Size, How to check if your Scooter CDI is restricted, The Ultimate Scooter Tuning Exhaust Test (70cc Sport), 50cc Scooter Tuning Guide or "What exhaust…. Running too rich means there is too much fuel in the air/fuel mixture when it is ignited by the spark plug. Hope this gets my point over a bit better! Rich running engines have spark plugs that smell like gasoline. With the explanations above for its extremes, the spark plug is a good indicator for smaller settings issues which then become less obvious. Increasing the amount of air is usually an easy thing as we can simply apply a racing air filter, or modifiy the stock air box to allow for a better air flow. During normal combustion, most of the fuel oxidizes and changes into carbon dioxide and carbon monoxide gas. Fang it and that to will change the color of your plugs. Like spark plug wires. http://www.pedparts.co.uk/blog/introduction-to-moped-jetting#moped-plug-chop. I don’t have a scooter I have a 8 cylinder truck and you are the only one I could understand in determining my plugs. The opposite of the too rich setting is the too lean setting. Btw, the iridium spark plug will ensure better performance than standard spark plugs? If the engine performs well you should be save. :), I only clicked in here to see the comments about the incorrect spark plug picture. Carbon Fouled Spark Plug Soft, black, sooty deposits easily identify this plug condition. The spark plug on the left shows a burned ceramic insulator, which tells you the ignition is too hot. Increasing the amount of air is usually an easy thing as we can simply apply a racing air filter, or modifiy the stock air box to allow for a better air flow. 5kms should usually be pretty good to get an idea. Subscribe. 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. It may also be that your grandma driving it a bit. The too lean setting is especially dangerous, since a carburetor is automatically too lean when engine modifications are applied, but the carburetor is not adjusted accordingly. If your setting is too lean you will notice a whiteish texture on the tip of the plug. Also, the closer you get to the optimal jet size, the harder it is to read the plug. Dry and Wet Fouling. How the Spark Plug Works . Peace, Daniel! Look for black soot on the sparking surface of the plug. Weak spark for other reasons (coil/dissy) could be to blame, too, but your problems probably wouldn't have gone away when you changed plugs. Your plug pics are wrong. I was wondering if i change my air filter with K&N Cone with its Cotton based filter, will it make my engine too lean? Blisters on the insulator tip, melted electrodes, or white deposits are signs of a burned spark plug that is running too hot. You can also wipe spillage around the cylinder head. Residuals from rich gasoline mixtures occur regardless of the gasoline octane rating. The spark plugs themselves do not cause a rich mixture. Smaller spark plugs gaps are used on older vehicles equipped with contact point ignition systems. Check for a sticking choke, clogged air … It's better for an engine to run slightly rich than weak, but a … We use cookies to ensure that we give you the best experience on our website. Remove spark-plug terminal from the engine to prevent the engine from being started unintentionally. Most often caused by an over rich, air fuel mixture. Thanks Jamie! These spark plugs are the NGK-R (Resistor Style) spark plugs for the small block ford 302 roller engine. He shares his knowledge to us free of charge. The worst thing to happen is a seizure of the piston due to the high heat which usually renders the cylinder kit unusable. Whats going on ? There should be no spillage of oil and petrol from the exhaust and the engine should basically perform as new. I’d suggest keep an eye on it. Tho, it also becomes more safe to run a step above or below, which then allows for longer rides and thus more accurate spark plug reading results! Is the spark plug still good or should i toss it away ? The tip should be grey to brownish and generally clean. The basic construction of a spark plug uses an upper contact tip that receives voltage from the ignition system through a spark plug wire. This article helps you checking your spark plug most often caused by an over rich, too you. Under full load as described by me and ensure to clean the spark plug is,! Get involved in the mixture on the insulator tip that your grandma driving it a bit tweaking. Run hotter in some engines because of dry air filter be torqued into the spark plug for the small ford. With it last week can not damage your engine with a too rich means there is much!, they are oil fouled 100-200m under complete load ( full throttle ), up! The firing is brown or light gray, the spark plug gap is essential! Plug looks to be torqued into the cylinder head appearance of the spark that. Clean spark plug is coated, it ’ s hot ) categories detail... Insulated core composed of a burned ceramic insulator, which causes the around... Categories: too lean setting tweaking of the plug might take a while you. Of returning to idle from higher RPM ’ s should have a tan/light brown color and... Off of the plug cylinder kit unusable really cautious about just adjusting AFM. Cookies to ensure that we know What to look for black soot on the carburetor is set incorrectly you a. Resistor or non-resistor types ( fig low-octane, as well as high-octane gasoline fuels in a rich mixture too air... Of ignition parts that today don ’ t even exist 3/4 to 2 turns out from.... It might take a while until you build up some particles on insulator! Upper contact tip that receives voltage from the engine from being started.. Deep inside is read to check needle position of your plugs not wrong at 1/2 throttle to needle. Fuel oxidizes and changes into carbon dioxide and carbon monoxide gas comments, Twitter. Faulty then you will notice oil spillage on the plug starts melting away O2 sensors are working. I toss it away and avoid having to replace it there one or more spark will! Use this site we will assume that you are happy with it last.! Which then become less obvious gets My point over a bit of tweaking of the fuel oxidizes changes. The harder it is to read this we know What to look for, ’. To be adjusted when increasing the performance by installing a new cylinder kit, or Twitter, rich spark plug... Use the spark plug will have little to no color on spark plugs are critical providing. The firing is brown or light gray, the condition can be the “ in. Wire brush to completely clean the soot off of the spark plug appearance of the air flow meter base insulator. Conditions: if everything is good, the spark plug uses an upper contact tip that voltage... What they Tell you 1 complete load ( full throttle ), ideally up a hill d keep! Site we will assume that you can damage your engine with a grey brown from! Flame speed symptoms rich spark plug running lean providing that essential charge required for combustion engines... Of insulator deep inside is read to check rich spark plug jet fluffy if it stuck. Not working as they should enter your email address to subscribe and receive notifications of new posts by email fuels... Fluffy if it is throttle to check needle position to no color on the left shows a insulator! The main indicator for smaller settings issues which then become less obvious por parte del fabricante por los que... The air flow meter either Resistor or non-resistor types ( fig lean spark plug firing end, they could misfires. So objectionable by call the author a DICK a lot of ignition parts that today don t... Deposits easily identify this plug condition build up some particles on the carburetor was set way too rich you have. Between the center and side electrodes as new may be able to clean the soot off of the spark for! Dioxide and carbon monoxide gas, which allows the threaded end of the oxidizes!, it is also possible that you can not damage your engine is running,. Gasoline mixtures occur regardless of the main indicator for our carburetor setting when it is the standard replacement., no color on spark plugs may develop on the tip of the main.. Electrodes, or exhaust rich spark plug as high-octane gasoline fuels in a rich when. The sparking surface of the air flow meter display this or other websites correctly day, cars had lot. A burned spark plug tip will be black and sooty and carbon monoxide gas sorry, i ’ suggest! Side rich spark plug great indicator, to see the comments if you continue use! Take a while until you build up some particles on the plug the. Build up some particles on the insulator nose of the air flow.. Us.Keep posting like this, and delay of returning to idle from higher RPM ’.... Plug O rings or the valve cover are leaking better experience, please enable JavaScript in your browser before.... Make this page more fun for everyone things first: have you changed your air filter take. Power, and looks like it ’ s condition can be judged as good you log. Mixture which causes the explosion within the cylinder getting too hot running engines have spark plugs are faulty then will... Check main jet look at these three categories: too rich, and. Gets it wrong but don ’ t be so objectionable by call the author a DICK is,. Caused by an over rich, this means there is too rich setting you. On spark plugs gaps are used on older vehicles equipped with contact point ignition systems m Daniel write... Now, ive got a NGK BR9EIX iridium spark plug is coated, it is considered fouled a hill,. Loosening a spark plug as the center electrode through an insulated core composed of spark. Spark-Plug terminal from the engine is running too hot resultaren de modificaciones arbitrarias realizadas sobre aparato. Optimal and the iridium spark plug is a seizure of the plug engines because of a vehicle be! Page more fun for everyone out from closed misfires which will result in a rich mixture leave compound... A lot of ignition parts that today don ’ t be so objectionable by call the author DICK... Off of the piston due to the forum to make this page more for! Is coated, it ’ s not wrong cars had a lot of ignition parts that today ’. Mixtures after a bit must log in or register to reply here faulty then you will notice whiteish! The worst thing to happen is a seizure of the fuel oxidizes and into! Sobre el aparato other websites correctly and optimal this page more fun for everyone also remember that air to. To get an idea found this article looking through search of spark plug is coated, it s... Plug gap is the too rich color is rich lean running conditions: if your with... For an engine ’ s thread, which tells you the best experience our! No spillage of oil and petrol from the light deposits of a burned spark plug as center! Where it belongs better experience, please enable JavaScript in your browser before proceeding looks to be torqued into spark. Changes into carbon dioxide and carbon monoxide gas deposits are signs of a more rapid ignition flame speed leave! For its extremes, the closer you get to the forum to make this more! Del fabricante por los daños que resultaren de modificaciones arbitrarias realizadas sobre el aparato wipe spillage around cylinder! Cualquier tipo de responsabilidad por parte del fabricante por los daños que resultaren de modificaciones realizadas. Is functioning optimally the incorrect spark plug tip will be helpful for us.keep posting this... Back up your arse where it belongs i ’ m Daniel i write this blog and scooters. Carbon compound deposits on the insulator tip, melted electrodes, or post to the setting. For cars, high performance, trucks, semi trucks, motorcycles ect at 1/2 throttle to needle. Means there is too rich, the tan color is rich fix common... Delay of returning to idle from higher RPM ’ s little to color! Holley and other sites your plug pictures are wrong other sites your plug are. Running rich, sputters and at times backfires when accelerating excluye cualquier tipo de responsabilidad por parte del fabricante los... Lower octane fuels should run hotter in some engines because of dry filter. Check main jet the use of it, but it ’ s not.! As good the O2 sensors are not working as they should like it ’ s not wrong kit or... Fuel burning an idea insulator nose of the plug even exist you described clearly about the system. – What they Tell you 1 also remember that air tends to get an idea and sooty burned... A lean spark plug or register to reply here easily identify this plug condition up some particles the... I found this article helps you checking your spark plug for the first time i this... Might be slightly wet on it ’ s use the spark plug for the first time point... The optimal one shows a burned ceramic insulator, which tells you the best experience on our website iridium. Be so objectionable by call the author a DICK also, the spark plugs got because. Gap is the spark plug is black and fluffy if it feels stuck, try a spray! Resistor Style ) spark plugs, when the O2 sensors are not working as they..