In this article, we\u2019ll go through the following steps to solve stuttering.<\/p>\n\n\n\n Sensored motors run smoother during acceleration on the low end and prevent cogging. But if the sensor wire detaches or isn\u2019t connected properly, it may cause stuttering.<\/p>\n\n\n\n Following your user manual to reset the ESC can also solve stuttering.<\/p>\n\n\n\n When it comes to brand new cars, I suggest going through an exchange process with the supplier before soldering or replacing anything, but there are some basic things you can do first without risking the warranty. <\/p>\n\n\n\n For older RC cars that are out of warranty, you might need to replace parts as discussed further below.<\/p>\n\n\n\n Remove the body from the car and check that all the wires are connected properly. <\/p>\n\n\n\n Every wire should be firmly connected to the electronics on both sides. Refer to the owner’s manual to verify the layout. It\u2019s possible that there are loose or faulty connections, even if the RC is straight from the manufacturer.<\/p>\n\n\n\n You also need to check that the caps are soldered properly to the wire. If any wires are disconnected, you might need to solder them on the right spots. <\/p>\n\n\n\n If you don\u2019t have the tools for that, check with a friend or visit the hobby shop for assistance.<\/p>\n\n\n\n You might need to connect the sensor wire from the ESC to the motor even if it\u2019s a new unit. Sometimes there are factory faults. The sensor wire has a rectangular connection point that needs to be inserted firmly into the motor and ESC.<\/p>\n\n\n\n Check out my post:<\/strong> RC car steers but won’t move? <\/a><\/strong><\/p>\n\n\n\n Use long nose pliers to gently remove, inspect, and reinsert the sensor wire to the motor and ESC.<\/p>\n\n\n\n You might have a bad motor.<\/p>\n\n\n\n Sometimes screws can short out the motor if they\u2019re too close to the windings. You\u2019ll need a multimeter with Continuity Test Mode to test for shorts. <\/p>\n\n\n\n This one<\/a> by Etekcity is ideal, and won’t break the bank!<\/p>\n\n\n\n (Amazon link)<\/p>\n\n\n\n This mode will make a warning beep if it detects a short circuit. If you\u2019re using a cheaper multimeter without this feature, you can also check for zero resistance to identify short circuits.<\/p>\n\n\n\n See my related article on how to tell if an RC motor is bad <\/a><\/strong><\/p>\n\n\n\n Make sure the batteries in the RC are fully charged. If the batteries in the radio are old, replace them as well. <\/p>\n\n\n\n Although higher-quality batteries aren\u2019t usually the cause for stuttering, if you\u2019re using old batteries or lower quality batteries, you might need to replace them.<\/p>\n\n\n\n If the stuttering gets worse as the car goes further away, the receiver that tells the motor what to do might be faulty and losing signal as it moves further from the radio. <\/p>\n\n\n\n You\u2019ll have to take the car in for someone to test with a new receiver.<\/p>\n\n\n\n Also, try recalibrating the remote so it reads correctly. This could solve the stuttering.<\/p>\n\n\n\n If you have an older RC and the sensor wire is a bit corroded, you\u2019ll have to replace it. <\/p>\n\n\n\n I\u2019ve even seen some sensor wires fail with no appearance of damage, so it could help to take the car to the hobby shop to test it.<\/p>\n\n\n\n An old ESC can begin to short circuit for no apparent reason. If you have your own multimeter to test for continuity throughout the ESC and find that there\u2019s a short, you\u2019ll have to replace it.<\/p>\n\n\n\n See my post on how to tell if your ESC is bad <\/a><\/p>\n\n\n\n A selection of ESC’s to suit any RC car can be seen here<\/a> on Amazon.<\/p>\n\n\n\n Check if the motor screws are touching the windings.<\/p>\n\n\n\n Check the motor wires are connected properly to the ESC.<\/p>\n\n\n\n Related post:<\/strong> Can A Bad ESC Burn Up An RC Motor?<\/a><\/p>\n\n\n\n The motor itself could be the problem, it could simply be a bad motor, especially if it\u2019s an older motor that\u2019s been used a lot. <\/p>\n\n\n\n Upgrading to a motor with more poles can help because the more poles it has, the smoother it runs. Replacing the motor can be done within minutes to see if it eliminates the stuttering.<\/p>\n\n\n\n If you\u2019re using a sensorless motor, you might be experiencing what is known as cogging.<\/p>\n\n\n\n A “cogging issues” problem is when a brushless motor appears jumpy or jittering. It is much more common at slower speeds than faster ones because high speeds tend to smooth the motor out considerably.<\/p>\n\n\n\n As mentioned above, upgrading to a brushless motor with more poles usually solves the problem. <\/p>\n\n\n\n <\/p>\n\n\n\n See my related post:<\/strong> Do Brushless Motors Lose Power Over Time?<\/a><\/p>\n\n\n\n This will typically make startup easier and reduce cogging. A motor with more poles performs much smoother at lower speeds.<\/p>\n\n\n\n See a selection of sensored RC motors on Amazon here<\/a><\/strong><\/p>\n\n\n\n An oversized pinion gear can cause stuttering, so if you\u2019ve recently changed the motor, you might need to change the gears to suit the new motor.<\/p>\n\n\n\n![\"RC](\"https:\/\/www.goodiesrc.com\/wp-content\/uploads\/2022\/03\/stuttering-rc-car.png\")
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Check The Wiring<\/h2>\n\n\n\n
Check Your Solder Joints<\/h2>\n\n\n\n
![\"\"](\"https:\/\/www.goodiesrc.com\/wp-content\/uploads\/2022\/03\/stuttering-2.png\")
Connect The Sensor Wire<\/h2>\n\n\n\n
Test For Short Circuits In The Motor<\/h2>\n\n\n\n
Charge Or Replace The Batteries<\/h2>\n\n\n\n
Test The Receiver<\/h2>\n\n\n\n
Replace The Sensor Wire<\/h2>\n\n\n\n
Replace The ESC<\/h2>\n\n\n\n
![\"\"](\"https:\/\/www.goodiesrc.com\/wp-content\/uploads\/2022\/03\/stuttering-3.png\")
Check The Motor<\/h2>\n\n\n\n
Test With A New Motor<\/h2>\n\n\n\n
What Is Cogging?<\/h2>\n\n\n\n
Downsize The Pinion Gear<\/h2>\n\n\n\n
![\"\"](\"https:\/\/www.goodiesrc.com\/wp-content\/uploads\/2022\/03\/stuttering-4.png\")