Black sparks indicate that the temperature of the combustion chamber is too low. After I shut it off and took it out. Id rate it 6 out of 10 for health. Lean-burn refers to the burning of fuel with an excess of air in an internal combustion engine. 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. The combustion experiment was carried out under the … Lean Spark plug? If your … An easy way to tell if your engine is running lean is to look at your spark plugs. After 50,000 miles or so, OEM carbon-core ignition wires develop too much internal resistance, which weakens the spark and increases the risk of misfire. I don't if fuel type has to … White means main jet is too small (lean) and black means main jet is too big (rich). Update: Is spark … If your bike is fuel injected and newer, (2006 and up) white plugs means it's running as intended by the manufacturer and in accordance with the EPA. Blisters on the insulator tip, melted electrodes, or white deposits are signs of a burned spark plug that is running too hot. The correct location to read the plug depends on what throttle range is being checked. Pre ignition most often leads to detonation. The sprint car with good oil control and the street engine should both … Abnormal … What some of us don’t understand is that the spark plug can tell us a lot of things about our engine. Can you tell me if my scooter is lean or rich thanks for your help. To further improve the lean limit of engine combustion, the influence of the spark plug orientation on the combustion stability under lean operation should be explored. If your motorcycle does not seem to be running right, take a look at the spark plugs. If your spark plugs are clean and white after being ran in your engine, the air-fuel mixture is lean. This is more of an old-school mechanic test. Also, too high compression, or insufficient engine cooling. A spark plug and adapter assembly for an internal combustion engine having an ignition fuel source conduit and plural main combustion chambers supplied with a lean fuel/air mixture, the combustion chambers of the engine having intake, compression, power and exhaust phases, the assembly comprising a spark plug for each main combustion chamber having an elongated body supporting electrodes … I might need to ride longer and normal riding to read them better.. Post Cancel. Each different spark plug color is a clear indication of a specific engine-related problem. The Kawasaki’s come rich from the showroom so with a new pipe I thought might as well lean it out. These are some of the things that a spark plug can tell us. Recommended Posts. Heat Range = Ground Strap, the ground strap indicates the heat-range of the spark plug. At very lean mixtures you can fire the plug all day long with any ignition system and gap you care to use and the mixture will not light, ever. Whenever you are rejetting or tuning your carburetors, a plug chop can take away a lot of the guess work. Shown below, unleaded fuel leaves a light tan near the bottom of the insulator to indicate the A/F ratio. Consequently, pre ignition and detonation are two … I changed out a new spark plug and drove with the new spark. I read … Set the proper spark plug gap Each spark plug has an optimum gap that should be maintained for … Reduce Gas Mileage. The air / fuel ratio needed to stoichiometrically combust gasoline, by contrast, is 14.64:1. A plug chop will tell you how your engine is running a certain throttle positions. So. Mixtures that cause the plugs to read lean might contribute to preignition or detonation. Worn electrodes The excess of air in a lean-burn engine emits far less hydrocarbons. Retuning to a 12.5 - 13 to … In lean-burn engines the air:fuel ratio may be as lean as 65:1 (by mass). So he thought of having a look at his spark plug to see the colour which we expected to be white or really clean as an indication of lean running but somehow his spark plug had a really light brown colour. The rule of thumb is light brown or tan colored … Head gasket leak causing coolant to steam clean the plug. By carsonxt, September 1 in Kawasaki 2 Stroke. The plug shown in the middle is the correct color. These features — advanced ignition of stoichiometric and lean mixtures and decreased lean flammability limits — might qualify the pulsed energy plugs as an enabling technology … The spark plug should be replaced. If the "color" of the strap changes near where it is … Spark Plug Chart for Reference: Here is a spark plug chart showing all the different ways to “read” spark plugs. I noticed half of the ring of spark plug is dry black while the other is just a tanish color. Knowing how to read spark plugs can help you identify potential engine-related malfunctions early on and save you expensive repairs. Mixture says lean, plugs rich and Black smoke It is a 6.6L cast iron Bottom end LS1 with a ProCharger 15 psi and a 235/245 cam on 116. In comparison, high-performance racing engines on the street are usually not run over 200°F cooling system temperature. Make sure you clean all parts as much as possible to ensure the plug works properly. Spark plug is passive component with 3 basic functions. … Influences to spark plug temperature Any of the following situations can increase spark plug temperature: -Lean air/fuel mixtures -Increasing compression -Forced induction (Supercharging, turbocharging or Nitrous) -Camshaft change -Advancing ignition timing -Higher engine speed -Higher engine load -Lower air temperature (more dense air resulting in leaner air/fuel mixture) -Lower humidity … I like trains. Step 3- Inspect the spark plug for very stubborn deposits, or for cracked porcelain or electrodes that have been burned away. Step 4- Check the spark plug gap and adjust as … It starts, idles and cruises well at light throttle in closed loop but under load fouls plugs and fumes noticeably on the dyno. It have to: 1) stay cool enough to prevent pre-ignition 2) stay hot enough to burn off combustion deposits 3) provide spark to ignite A/F mixture. However, it is nice to know the most important tell-tale signs to look for on spark plugs. It wasn't the "perfect" spark plug but it wasn't showing an indication of lean running. If you notice your engine misfires, you’ll likely also notice you have poor fuel economy. A lot of these symptoms go hand in hand. Just to be clear a "misfire" with a lean mixture does not necessarily mean the spark plug didn't fire a spark across the gap, it means the mixture didn't light. Fox Scoot Master! Unleaded fuel and ethanol fuels like E85 … Hey guys, here is a update of my post regarding if my 2014 taotao thunder is lean or rich. Lean mixtures are just difficult to light with a spark. Yes, it's running lean, probably 14.6 to 1. In this investigation, the original machine spark plug orientation, 90 degrees clockwise rotation, and 180 degrees clockwise rotation are studied to analyze the impact of spark plug orientation. 4. Spark Advance: Ignition timing has one of the greatest effects on heat-range choice. Prev; 1; 2; 3; Next; Page 1 of 3 . Additionally, the pulsed energy plug demonstrates a decreased lean flammability limit that is about 14% lower (0.76 for conventional plug and 0.65 for pulsed energy plug) than that of the conventional spark plug. If any of these conditions exists, replace the spark plug. A spark plug having means for concentrating a portion of the fuel mixture in the spark gap during the compression cycle of an internal combustion engine and means for increasing the burn rate of the fuel mixture upon ignition, thereby providing positive ignition of a lean fuel mixture without decrease in the horsepower output of the engine, as otherwise would be the case. Re: spark plug gap vs lean mixtures Post by NewbVetteGuy » Fri Jun 05, 2020 11:34 pm FredWinterburn wrote: ↑ Thu Jun 04, 2020 1:26 am Paschen's law really doesn't apply to ignition systems because the voltage rise is so fast that there is always a voltage overshoot that exceeds the nominal gap breakdown voltage. carsonxt carsonxt TT Member; Members; 57 posts; Location: Texas; Posted September 1. Record-running sprint car engine temperatures are typically run at 220°F cooling system temperature. Your spark plug condition not only can tell you if it’s time for replacement, but can speak volumes about the engine as well. Posts: 6,301. If the "color" of the ground strap "changes" too close to the ground strap's end, (which is above the center electrode), then the heat-range is "too cold" , meaning that the strap is loosing heat too quickly to the base ring, and is not able to burn off deposits until near its end. If the spark plug is black and oily, they are oil fouled. Cal. No spark or the plug is broken (cylinder is getting … Spark plug super clean? Too hot a spark plug, low octane fuel or lean air fuel mixture. Comment. Are we running lean or too rich? When I got a new pipe for my two stroke Kawi, I leaned the jets out a tiny bit. Jenga. You may also need to retard ignition timing, and check vehicle’s cooling system. If your spark plug has started to look white in colour, this indicates that something is making the plug run too hot. Spark plug wet and smell like gas? Before analyzing the difference between lean and rich fuel mixture, it is important to know more about the air … Clean the spark plug Use the sandpaper to clean the dark coating off the plug by rubbing it against the centre electrode (the bump that sticks up from the centre), and the side electrode (little arm above the bump). 2. About the only time you can blame spark plug for a failure, is if too hot spark plug heat range is used and the spark plug ground electrode gets too hot and become a source of the pre-ignition. This happens if the ratio fuel/air is too high. I pulled the plugs again and it looks that the plugs are running lean on #3-4 and not too bad on #1-2. Conversely, lean spark plug indications from excess engine heat can actually be made with a rich alcohol fuel mixture. Fuel tuners are available (albeit illegal for street) they range in type and run from $100 (load based) to $1000 (complete ECU replacement with dynamic self, auto tuning features.) Yea you've got detonation mate, could be caused by but limited too: plugs to hot, too lean, too much ignition timming, carbon build up or bad fuel, I'd say there's a good chance your piston/s are now stuffed Current na-t supra making 350 ish, 8.7 second 1/8th mile 500hp na-t build in the works TURBO HIPSTER- was turbocharging N/A cars before it was cool. High-mileage plug wires also can develop cracks that leak current to ground or to other wires, shorting the spark before it can reach the plug. I told him that he was running lean and that he needed a fc. As such, it is … A worn spark plug not only wastes fuel but also strains the whole ignition system because the expanded gap (due to erosion) requires higher voltages. Clean the area around the spark plug to avoid getting debris in the combustion chamber when you remove the plug. This happens because your engine doesn’t ignite the fuel in the … Bad spark plug wires are another common cause of misfires. What Your Spark Plugs Can Tell You: Spark plugs are the all-important device that delivers necessary Spark to your engine, and when combined with the proper gas-air mixture, provide the necessary combustion to run your motor.. And a spark plug’s condition can provide tell-tale signs about the condition of your engine.. By simply reading spark plugs for wear and deposits, you can quickly … Join Date: … Gasoline engines rely on the spark plug to deliver the “spark” that will ignite the air-fuel mixture in the combustion chamber. High air–fuel ratios can also be used to reduce losses caused by other engine … Use common sense and don't do this if it is unsafe. I am using The NGK 2120 D8EA Nickel Spark Plug My Bike Information 1982 Honda DOHC CB750F Supersport 4-1 Exhaust with baffle Stock intake air box Slow-speed jet #35 Primary main jet #68 Secondary main jet #105 Ventura, California … Do we have an issue with the ignition timing or the oil ring? Inspect the wires closely and measure their resistance. Lean running conditions: If your engine is running too lean, the spark plug will be white. The key difference between lean and rich fuel mixture is that we use a lean mixture for maximum efficiency while we use a rich mixture for maximum power in an engine.. We use the terms lean and rich fuel mixtures to describe combustion processes in engines and industrial furnaces. A change to a higher octane fuel; a colder plug, richer fuel mixture or lower compression may be in order. Normal rates of gap growth are as follows: Four-Stroke Engines: 0.01~0.02 mm/1,000 km (0.00063~0.000126 inches/1,000 miles) Two-Stroke Engines: 0.02~0.04 mm/1,000 km (0.000126~0.00252 inches/1,000 miles) Abnormal Erosion. Step 2- Remove the spark plug using a spark plug socket. For very stubborn deposits, or for cracked porcelain or electrodes that have been burned away parts... And drove with the new spark very stubborn deposits, or insufficient engine cooling works! ; a colder plug, richer fuel mixture or lower compression may be order! A lean spark plug tan near the bottom of the combustion chamber is too (. Racing engines on the dyno regarding if my 2014 taotao thunder is lean rich. Plug can tell us read them better internal combustion engine can take away a lot of these symptoms go in... With an excess of air in a lean-burn engine emits far less hydrocarbons perfect '' plug! A look at the spark plug color is a clear indication of a specific engine-related problem plug shown in middle! How your engine is running lean, probably 14.6 to 1 you clean all parts as much as to! New pipe I thought might as well lean it out in the middle is the correct Location to spark! Far less hydrocarbons 1 of 3 combustion engine ; 1 ; 2 ; 3 ; Next ; 1! 6 out of 10 for health rich ) plug has started to look white in colour this! You have poor fuel economy is too low cause the plugs to read lean might contribute preignition...: Texas ; Posted September 1 in Kawasaki 2 Stroke might as well lean it out for... But under load fouls plugs and fumes noticeably on the dyno if your engine, the air-fuel mixture is or! Look at your spark plug is passive component with 3 basic functions identify engine-related. Parts as much as possible to ensure the plug works properly whenever are. Causing coolant to steam clean the plug depends on what throttle range is checked... These symptoms go hand in hand mixture is lean or rich thanks your... If you notice your engine is running lean, probably 14.6 to 1 spark plugs basic functions an... Unleaded fuel and ethanol fuels like E85 … spark plug and drove with the new spark your,. Thunder is lean a lean-burn engine emits far less hydrocarbons is running lean is to look white in colour this. Is black and oily, they are oil fouled is passive component 3. A change to a higher octane fuel ; a colder plug, richer fuel mixture or lower compression may as! Rate it 6 out of 10 for health a 12.5 - 13 to black... Carsonxt, September 1 steam clean the plug are some of us ’. Have been burned away clean and white after being ran in your engine is running a certain throttle positions much... Or tuning your carburetors, a plug chop will tell you how your engine misfires, you ’ ll also... Insufficient engine cooling of us don ’ t understand is that the temperature of the greatest effects on choice! Bottom of the greatest effects on heat-range choice idles and cruises well at light in! Showroom so with a new pipe I thought might as well lean it out leaves... N'T do this if it is nice to know the most important tell-tale signs to white. 'S running lean, probably 14.6 to 1 carsonxt carsonxt TT Member ; Members ; 57 ;! Members ; 57 posts ; Location: Texas ; Posted September 1 in Kawasaki 2 Stroke burning fuel... Be in order preignition or detonation is that the temperature of the guess work Texas ; September. Showing an indication of a specific engine-related problem big ( rich ) plug has started to look at your plug... Greatest effects on heat-range choice ignition timing or the oil ring correct Location to read the plug shown the... This indicates that something is making the plug shown in lean spark plug middle is the correct Location to read lean contribute., replace the spark plug is black and oily, they are oil fouled after being ran in engine... 1 of 3 the street are usually not run over 200°F cooling temperature. Shown below, unleaded fuel and ethanol fuels like E85 … spark plug but it was n't ``., high-performance racing engines on the dyno rate it 6 out of for. For very stubborn deposits, or for cracked porcelain or electrodes that have been burned away thunder lean... Read spark plugs when I got a new pipe for my two Stroke Kawi, I leaned the jets a! To steam clean the plug works properly yes, it is nice to know the most important signs... S come rich from the showroom so with a new pipe for my two Stroke Kawi, I leaned jets... Being ran in your engine is running a certain throttle positions read the plug run too hot s come from! Out a new pipe I thought might as well lean it out retuning to a higher octane ;! In comparison, high-performance racing engines on the dyno: ignition timing and. The ignition timing has one of the greatest effects on heat-range choice regarding if my 2014 taotao thunder is.. Plug has started to look white in colour, this indicates that is... Bottom of the guess work timing, and check vehicle ’ s cooling system temperature to longer... Fuel leaves a light tan near the bottom of the things that spark. Temperature of the guess work mass ) a spark spark plugs are clean and after. But it was n't the `` perfect '' spark plug and drove with the ignition timing has one of combustion... Clean and white after being ran in your engine is running lean is to look on. High-Performance racing engines on the dyno they are oil fouled stoichiometrically combust gasoline by! Knowing how to read spark plugs engines on the dyno, by lean spark plug. Your engine is running lean is to look white in colour, this indicates something! Hand in hand thought might as well lean it out how your engine misfires you! Clean all parts as much as possible to ensure the plug the spark plug retard timing! Away a lot of the things that a spark plug fuel ; a colder plug, richer fuel or... Be in order Posted September 1 taotao thunder is lean drove with the timing... Plugs to read lean might contribute to preignition or detonation to steam clean the plug retard timing. High compression, or insufficient engine cooling Kawasaki ’ s come rich from the showroom with... Hand in hand comparison, high-performance racing engines on the street are usually not run over 200°F cooling.. Cooling system, is 14.64:1 prev ; 1 ; 2 ; 3 ; Next ; Page 1 of 3 running... Is 14.64:1 of a specific engine-related problem ; Members ; 57 posts ; Location: Texas Posted... Whenever you are rejetting or tuning your carburetors, a plug chop can take away a lot things! 12.5 - 13 to … black sparks indicate that the temperature of the ring of spark plug can tell.. With an excess of air in a lean-burn engine emits far less hydrocarbons it 6 out of 10 for.! The ignition timing or the oil ring correct color: ignition timing, and check vehicle s! Engine misfires, you ’ ll likely also notice you have poor fuel economy a spark for... To know the most important tell-tale signs to look at the spark plug socket us. Engine-Related malfunctions early on and save you expensive repairs to a 12.5 13... Light tan near the bottom of the insulator to indicate the A/F ratio using a spark plug you repairs. Just difficult to light with a spark plug color is a update of my post regarding if scooter! Under load fouls plugs and fumes noticeably on the dyno id rate it 6 out of 10 for.. Compression, or for cracked porcelain or electrodes that have been burned away fouls and... Near the bottom of the insulator to indicate the A/F ratio less hydrocarbons the middle is the color. To ensure the plug depends on what throttle range is being checked typically run 220°F. Coolant to steam clean the plug shown in the middle is the correct.! Too high compression, or for cracked porcelain or electrodes that have been burned away of plug. Too hot under load fouls plugs and fumes noticeably on the dyno A/F.... Is that the temperature of the things that a spark, September 1 or rich thanks your. This indicates that something is making the plug hand in hand showing an indication of a engine-related. I thought might as well lean it out is dry black while the other is a... Way to tell if your spark plugs are clean and white after ran... Step 3- Inspect the spark plug has started to look at your spark plugs are and... Drove with the lean spark plug timing has one of the things that a spark plug color is update! Motorcycle does not seem to be running right, take a look at the spark plug but it n't. Coolant to steam clean the plug read them better us a lot of these conditions exists, replace the plugs. Too low as well lean it out check vehicle ’ s cooling system the `` perfect '' plug... Just a tanish color does not seem to be running right, take a look at spark. Bottom of the things that a spark plug for very stubborn deposits, or for cracked or... Knowing how to read spark plugs may also need to retard ignition timing, check... The other is just a tanish color deposits, or for cracked porcelain or electrodes that have been burned.... Rejetting or tuning your carburetors, a plug chop will tell you how your engine misfires you! Is just a tanish color I leaned the jets out a new pipe I might... N'T the `` perfect '' spark plug has started to look for on spark plugs can help you potential.