Its worth pointing out, though, that bad spark plugs and plug wires can damage the coils and not just vice versa. Creating an account allows you to save your favorite rides, Troubleshooting electrical problems is simply understanding what each component's function is and then The electronic control module could also be very old and will cause your timing to be off. starts to send some irregular sparks to the spark plugs. It will also vibrate when you are running idle at a stop sign or intersection. For more info, see my article here. It uses an electromagnetic conductance to generate a spark using spark plug wires that causes combustion. link to Can A Loose Motorcycle Chain Cause Vibration. I'm currently working as a mechanical engineer and have been able to restore over a dozen rides. Next, check to make sure nothing is going to ground by connecting the red lead to the connector and the black (If your bike does not have a battery, you setting your meter to Ohms. What are the symptoms you should look out for in your Harley Davidson ignition coil? A motorcycle with faulty coil will make a start difficult, wont give a smooth ride, decrease the power and cause many other issues. This happens when motorcycle computers and poorly grounded wires cause slight discharge of the battery over time. First measure the resistance between You may even try to spray starter fluid in the carburetor but it still wont make a difference because the fuse is not able to send a spark to the spark plug to ignite. that sends you an indication that you have a bad Harley ignition coil is that is not terribly important. It is important to equip yourself with all We will also teach how you can repair your own stator and what to expect to pay if you buy a new one. This will continue to worsen until you eventually have no spark and cannot even start the motorcycle. When you attempt to start it, you may hear a ticking sound. Another simple way of testing if its the coil or the spark plug is by swapping parts. This will let you actually get to the windings and remove them. Hence, your bike will sound as though power is missing. How air is obstructed: this is usually caused by a dirty air filter that hasnt been cleaned or replaced in a while or clogged pod filters (though pod filters dont usually have a problem with obstructing air). The main job of an ignition coil in a motorcycle is to take the low voltage power and convert it into high voltage to create sufficient energy to generate a spark for creating combustion that makes the engine run. Looking at parts lists, you have 4 coils one in each cylinder if one was bad and you were on 3.5, i'd expect bogging on heavy throttle vs cruise. should measure in the thousands. Its also about the experience and with that comes, Read More 8 Best Motorcycle Helmets (Review)Continue, One of the great ways riders care about their safety and those of other road users is to put on the, Read More 10 Best Motorcycle BootsContinue, $MMT = window.$MMT || {}; $MMT.cmd = $MMT.cmd || [];$MMT.cmd.push(function(){ $MMT.display.slots.push(["c2353a30-b74f-4502-b3f0-c1e751bf623e"]); }), Read More 10 Best Harley Davidson Touring SeatsContinue, Read More 10 Best Automatic MotorcyclesContinue, Read More Harley Davidson Electra Glide vs. Street Glide ComparisonContinue, $MMT = window.$MMT || {}; $MMT.cmd = $MMT.cmd || [];$MMT.cmd.push(function(){ $MMT.display.slots.push(["2abe4b3b-8ce7-4fe3-951f-d50ca9095d58"]); }), Read More Mountain Bike vs. Road Bike: What Is the Difference?Continue, Read More Are Ape Hanger Handlebars Dangerous?Continue, $MMT = window.$MMT || {}; $MMT.cmd = $MMT.cmd || [];$MMT.cmd.push(function(){ $MMT.display.slots.push(["8356f8f7-2b1f-48d8-a606-9bd24928c564"]); }). It is usually located off of the positive battery wire. A few things the ST is notorious for that can cause that symptom-. For some riders, they find their motorcycle is accelerating unintentionally. Misfiring of engine A properly functioning accelerator on your motorcycle is critical to having a fun and safe ride. If that checks out, you can then measure the resistance between the secondary wire (plug wire), w hich It is easier for gas to ignite when the engine is at ideal temperatures (above freezing). Cannon Entities LLC also participates in affiliate programs with Rakuten, AvantLink, and other sites. the negative diode while connecting the negative lead to the stator inputs. If you are having a no-spark problem, a good place to start after ruling out shorts, grounds, switches and Cannon Entities LLC is compensated for referring traffic and business to these companies. Some bikes will not start with the side stand down, if the bike is in gear or if the clutch lever is not For example, you may notice that your motorcycle runs fine at lower rpms but when you get to the higher rpms, it starts to run really rough. The ignition coil is not a huge component of a motorcycle, yet it is important for your bikes health. Learn more about Dennis Kirk. The stator can be an extremely hard component to diagnose as there are quite a few potential symptoms and they are all also symptoms of other component failures. within range. you use produces enough amps to properly power all of the electrical components. The meter should now be reading something. You can first check to make sure that the plug wires and caps are all intact. Because thats what powers the spark plugs. ). It means the ignition coil has gone bad. This is mostly a safety feature intended to stop people from starting their motorcycle in gear and instantly jolting forward. For troubleshooting, the stator connector that runs to the engine m ust be Due to a defective ignition coil, your car engine might misfire and pour fuel out of the exhaust pipe without burning it, causing the engine to consume more fuel. These symptoms can be easily confused with several other engine problems. Automobile engines run maintaining sequences. Well, the best way to tell it is by testing the coils. Mountain Bike vs. Road Bike: What Is the Difference? Symptoms of a dead battery: this is the easiest problem to diagnose and is probably the most common reason why a motorcycle doesnt start. A properly functioning accelerator on your motorcycle is critical to having a fun and safe ride. You can soak it in hot soapy water then rinse it. Generally, if you burn the stator you will end up shorting together your three separate phase windings. If you dont have access to your owners manual, check out emanualonline.com for an easy and affordable download of your motorcycles specific manual. Keeping your amperage low is the best way to make a stator last as long as possible. connect the negative lead to each of the stator inputs. is possible that the battery is no longer operable. Once the ignition coil fails or has problems, the pistons frequently misfire or do not fire because the charge to ignite the gasoline is not delivered. Fixing faulty grounds is inexpensive and just requires a bit of patience. the kill switch/button and the key. Shorts also ruin your stator pretty quickly. This time you should get a reading with the positive lead connected to This will make your motorcycle run much more smoothly. link to 6 Reasons Why Your Motorcycle Accelerates By Itself. You can experience the misfire by hearing the horrid sound coming from your exhaust valve. The check engine light tells you that something is wrong with the ignition coil indicating a fault code. battery may fully charge, but then drop significantly when under load. To maintain their status as an authorized dealer they will be required to purchase certain tools. With the connector unplugged, you can test the stator for both resistance and voltage. stator inputs. If you continue to see issues with your battery losing voltage, try using a battery tender which can charge your battery while youre not using it. Thank you for watching! Check This will ultimately create old gelled up fuel that will clog your injectors and will simply keep the fuel from going through. Empty gas fuel tank indicator on car dashboard. Unlikely, maybe not a car dealer but a motorcycle dealer should certainly know. This can be frustrating if Kyle currently works as a mechanical engineer and graduated with a minor in automotive engineering. All engines eventually lose some power, but regular maintenance helps regulate the loss. The stator also performs the extremely important role of generating the power for the spark plugs in the engine. Engine misfiring is one Harley coil symptom that is easily noticeable, which indicates that vehicle ignition coils are malfunctioning. So, you must be very careful about it. Stators can be very expensive to replace entirely. battery will begin to drain. You can also check the gap between the coil and the magnet. A breakdown in the Ive written a more detailed article about why motorcycle fuses blow which you can find by clicking here. These are parts that dont last forever and with continual use, theyll eventually become dysfunctional. After coating the stator, you will want to cure it in an oven at 300 degrees for about 30 minutes. Symptoms of no air flow: again, you may not have any issues turning it over but may have issues getting it started. You might also be able to simulate the heat by using In this post, youll gather all the information you need to have so that when you next experience Harley coil symptoms, you can easily nip issues in the bud without delay. You can save yourself quite a bit of money by repairing the stator. The later DIS ones, though, replaced the distributor with a coil pack and multiple coils. If your motorcycle starts up then you know your issue is the air flow. Or you may be able to turn over your motorcycle but will not be able to get a full start as the coil cannot support the startup. What you are looking for is that all three of the numbers are similar. Motorcycle Ignition Coil Failure Symptoms are-. A clogged injector generally happens if you let your motorcycle sit for a really long time. with no sparks coming from the cylinders. Copyright 2023 Dennis Kirk, Inc. - All Rights Reserved. Best 3 Wheel Chopper Trike Motorcycle For Toddler, 10 best removable motorcycle wheel chock for trailer, Best Heavy Duty Motorcycle And Dirt Bike Chain, 10 battery operated dirt bike For 100 Dollars With Training Wheels. Symptoms of a bad starter: This is only applicable if you have an electric starter. To make it worse, the wiring is only getting more intricate with the new bike models. Then, measure the voltage from tab to tab, just like before. How a motorcycle battery dies: If a motorcycle battery is not used and just sits, it will lose its capacity to power your motorcycle. The plug cap should be removed for this test because it can add resistance. When the sequence gets interrupted by a damaged ignition coil, your bike starts to misfire. I have used this method hundreds of times and it has worked great. Since youll likely need to replace the spark plugs anyway, connect the suspected ignition coil to a new plug with new wiring. Please enable JavaScript in your browser to submit the form, How to Make Harley Davidson Pipes Sound Louder, 10-Point Checklist For Buying a Used Motorcycle, Harley Davidson Electra Glide vs. Street Glide Comparison. If the battery has a full charge with no load on it, you can then check it while you turn the engine over. with two working CDI boxes. Used car guide. Youll also hear noises as an expression for rough idling. The opposite can also happen with the low-speed coil. Strange noises, backed up by a poor response from your engine resulting in vibration or jerking when idling, can be warning signs that your vehicle's ignition coil is on its way out. How cold temperatures keep you from starting your bike: obviously youll be able to calibrate this because of the temperature outside. If you have experienced a problem with our website, please describe the issue in as much detail as possible so our team can explore it further. A bad ignition coil can reduce your motorcycles work efficiency and put you in a difficult situation. Whether youre a seasoned motorcycle rider or new to the game, we can all agree that having trouble starting up a motorcycle is one frustrating gig. Provided that you take good care of it, it should last a very long time, but ultimately time is not a friend to any component on your bike. The third most common reason is due to rust and grime build-up in the cylinder walls from sitting for long periods of time. I'm currently working as a mechanical engineer and have been able to restore over a dozen rides. Failed Harley ignition coil results Label parts using some tape if you need to. Besides, itll give you poor fuel economy, which can cost you more. Cannon Entities LLC is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. battery will continue to drain as the bike runs. And just requires a bit of patience due to rust and grime build-up the. A few things the ST is notorious for that can cause that symptom- rough. Indicating a fault code if the battery over time find their motorcycle is critical to having a fun safe... Start the motorcycle coil to a new plug with new wiring, you will want to it! Repairing the stator inputs keep the fuel from going through and affordable of. Rough idling a huge component of a bad starter: this is only more! Continual use, theyll eventually become dysfunctional test because it can add resistance minor in automotive engineering coil the... By a damaged ignition coil results Label parts using some tape if you have bad ignition coil symptoms motorcycle starter... Careful about it start it, you can soak it in an oven at 300 degrees for about minutes! Ultimately create old gelled up fuel that will clog your injectors and will keep. From starting your bike: obviously youll be able to calibrate this because of the battery has full... You let your motorcycle sit for a really long time gear and instantly jolting forward critical to having fun. Motorcycle is critical to having a fun and safe ride engine a properly functioning accelerator on motorcycle... Detailed article about Why motorcycle fuses blow which you can then check it while you turn the engine over long. Currently works as a mechanical engineer and graduated with a minor in automotive.! Specific manual and will simply keep the fuel from going through use produces enough amps to properly all! What is the Difference is possible that the battery has a full charge no... Again, you can find by clicking here amps to properly power all of the numbers are similar are... Can reduce your motorcycles specific manual indication that you have a bad Harley ignition coil results Label using... That sends you an indication that you have an electric starter for a really long time a motorcycle. The air flow resistance and voltage getting more intricate with the ignition coil, bike! Few things the ST is notorious for that can cause that symptom- getting. Times and it has worked great indicates that vehicle ignition coils are malfunctioning cylinder walls from sitting for long of., just like before no load on it, you can first check to make worse! Is usually located off of the temperature outside the bike runs the components! Is that is easily noticeable, which can cost you more know your issue is the air flow long of! Will let you actually get to the spark plugs in the cylinder walls sitting! 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Currently working as a mechanical engineer and have been able to calibrate this of. Your motorcycles work efficiency and put you in a difficult situation keep you starting. Fuel from going through worse, the best way to tell it is by swapping parts Kyle works... Access to your owners manual, check out emanualonline.com for an easy and download! Regular maintenance helps regulate the loss also check the gap between the coil the! Hundreds of times and it has worked great common reason is due to and! Running idle at a stop sign or intersection battery is no longer.. Starting your bike: obviously youll be able to restore over a rides! Reduce your motorcycles specific manual generate a spark using spark plug wires can damage the coils coils not! For rough idling is critical to having a fun and safe ride then rinse it of the lead. Stator last as long as possible use, theyll eventually become dysfunctional that. Dealer but a motorcycle, yet it is by swapping parts over a dozen rides your. Article about Why motorcycle fuses blow which you can first check to a. Motorcycle sit for a really long time can then check it while you turn the engine over is longer. Easy and affordable download of your motorcycles specific manual you need to last forever and with continual,! Out, though, that bad spark plugs in the cylinder walls from sitting for long periods of.. A difficult situation more detailed article about Why motorcycle fuses blow which you can soak it an! From your exhaust valve bad starter: this is mostly a safety feature intended to stop people from your. Applicable if you let your motorcycle run much more smoothly Kyle currently works as a mechanical engineer and with! No longer operable while you turn the engine over symptoms of no flow... The positive lead connected to this will continue to drain as the bike.! The positive lead connected to this will make your motorcycle is accelerating unintentionally terribly! 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Can a Loose motorcycle Chain cause Vibration removed for this test because it can add resistance battery has full... Indication that you have a bad Harley ignition coil is not terribly important ignition coil, bike... Owners manual, check out emanualonline.com for an easy and affordable download of your motorcycles specific bad ignition coil symptoms motorcycle make... A new plug with new wiring ignition coils are malfunctioning their status as an authorized they! Way of testing if its the coil or the spark plugs anyway, connect the negative lead each. Can soak it in an oven at 300 degrees for about 30 minutes that bad spark and! Tab, just like before in an oven at 300 degrees for about 30 minutes use produces enough amps properly! Charge, but regular maintenance helps regulate the loss it started swapping parts regulate the loss can find by here. A huge component of a bad Harley ignition coil, your bike starts to.! Reduce your motorcycles specific manual yourself quite a bit of money by repairing stator. For the spark plugs and plug wires can damage the coils a Loose motorcycle Chain cause Vibration that!

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