You expect the engine to start and then the starter to disengage when you turn the key in your car’s ignition. But sometimes, the starter keeps running even after the engine has started. So what causes a starter to keep running after the engine starts?
There are a few potential causes of a starter that keeps running. It could be a problem with the starter itself, the ignition switch, or a wiring problem. Regardless of the cause, it’s a problem that can lead to a dead battery, so it’s important to troubleshoot it as soon as possible.
In this article, we’ll discuss the possible causes of a starter that keeps running, and how to fix them. We’ll also talk about how to prevent the problem from happening in the first place.
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What causes a starter to keep running after the engine starts?
A starter that keeps running after the engine starts can be caused by several things. Let’s see these causes in detail:
1. Faulty starter solenoid
One of the most common reasons a starter keeps running after the engine starts is a faulty starter solenoid. The starter solenoid is a small cylindrical device located on the starter motor. It is responsible for supplying power to the starter motor from the battery. When the ignition key is turned, the starter solenoid is activated and a small electric current is sent to the starter motor, which in turn starts the engine.
If the starter solenoid is faulty, it can cause the starter motor to keep running even after the engine has started. This can be extremely dangerous as it can lead to the engine stalling or even catching fire.
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2. Ignition switch problem
It is not uncommon for a starter to keep running after the engine has started. This is usually due to a problem with the ignition switch. When the ignition switch is turned on, it sends a signal to the starter relay. The starter relay then sends a signal to the starter solenoid. The starter solenoid activates the starter motor.
However, if the ignition switch is not working properly, it may not send the proper signal to the starter relay. As a result, the starter relay may not send the signal to the starter solenoid. This will cause the starter to keep running even after the engine has started.
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3. Worn-out starter
Another common reason a starter keeps running after the engine starts is a worn out starter. The starter is a very important component of the engine and it is subject to a lot of wear and tear. Over time, the starter motor can become worn out and it may not stop running even after the engine has started.
4. Faulty starter relay
A starter that keeps running after the engine starts can also be caused by a faulty starter relay. The starter relay is responsible for sending a signal from the ignition switch to the starter solenoid. If the starter relay is not working properly, it may not send the signal to the starter solenoid. As a result, the starter will keep running even after the engine has started.
5. Loose battery connections
Loose battery connections are another common cause of a starter that keeps running after the engine starts. The starter is powered by the battery and if the battery connections are loose, it can cause the starter to keep running.
Tighten the battery connections and if the problem persists, it is advisable to take action immediately.
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How to fix the problem?
As you can see there are a few different reasons that can cause this problem, you have to know what’s the exact problem to fix this issue. So, how to figure out the exact problem?
To figure out the exact problem, start by checking the solenoid. If it’s faulty or dirty, clean or replaces it. If that doesn’t solve the problem, check the starter drive gear. If it’s worn out, replace it.
If the starter drive gear is fine, the problem is most likely due to a wiring issue. Check the wiring between the starter and the battery, and between the starter and the ignition switch. If any of the wires are loose or damaged, replace them.
Are your cars not have wiring issues? then the problem might be with the ignition switch. Try replacing the switch. If that doesn’t work, the starter motor is probably the problem. In this case, you’ll need to replace the starter motor.
In rare cases, the problem might be with the flywheel. If the teeth on the flywheel are damaged, they might not be able to engage properly with the starter.
In the end, if you think this is complicated or, you do not have proper repairing knowledge, then it will be better to call a mechanic and fix this problem.
Frequently Asked Questions
What causes a starter to stay engaged?
A starter can stay engaged for a variety of reasons. A common cause is a faulty starter solenoid. Other causes can include a faulty starter motor or a problem with the starter circuit.
Does the starter disengage after the engine starts?
The starter should disengage after the engine starts. If it does not, it is likely due to a problem with the starter solenoid, starter motor, or starter circuit.
What does a stuck starter motor sound like?
A stuck starter motor can make a grinding or whining noise.
What are the 5 five common problems for solenoid?
The 5 five common problems for solenoid are:
1. A starter that stays engaged after the engine starts
2. A starter that makes a grinding or whining noise
3. A stuck starter motor
4. A problem with the starter circuit
5. A faulty starter solenoid
Can a stuck starter solenoid drain the battery?
Yes, a stuck starter solenoid can drain the battery.
What are two symptoms that would indicate a faulty starter solenoid?
Two symptoms that would indicate a faulty starter solenoid are a clicking noise when the ignition switch is turned to the start position, or the starter solenoid staying engaged even after the engine has started.
What are the symptoms of a faulty starter motor?
The symptoms of a faulty starter motor are a clicking noise when the ignition switch is turned to the start position, or the engine not cranking when the ignition switch is turned to the start position.
How do you bypass a starter solenoid?
You can bypass a starter solenoid by disconnecting the wire from the solenoid and connecting it directly to the starter motor.
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The Bottom Line
As you can see, there are a few potential causes of a starter that keeps running after the engine starts. No matter what the problem is, it is important to fix the problem immediately to prevent serious damage. We hope our article can help you out with this type of situation. For further queries, feel free to comment below!
Originally from England, I’ve been repairing cars for over 16 years and am an automotive journalist. I’ve been working on cars for as long as I can remember, and it’s one of the best jobs I’ve ever had.
It is my intention to be your mechanic friend, that person who will assist you with any problem you may have with your vehicle and explain in detail how the problem can be fixed to you as soon as possible.
I produce and anchor a weekly auto news program. As well as providing insights into all things automotive, including expert analysis of the latest trends in the automotive industry, and ensuring you always know where to go for the latest automotive news, I also provide insight into all things automotive before the news breaks.
If I am not working, I am a riding motorcyclist and I do volunteer work with local charities whenever I have time. When I’m not riding my motorcycles or volunteering at local charities, you will find me at home in Portland, Oregon.