My car only starts sometimes. is it my starter switch?

When I turn the key, fuel pump engages, and when i try to crank the engine there's just a click. Starter relay is fine, repair shop told me it's not the starter itself. When it starts, it starts perfectly. If it doesn't, it doesn't crank. New battery, New spark plugs, engine hasn't seized. Maybe the starter switch? How can iI start my car anyway? Maybe a self-fix I could do

My car has 120000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
What you are describing sounds like a faulty starter solenoid. If you hear a clicking sound when turning the key, it is likely that your starter solenoid may be faulty. The starter solenoid is located on the starter and has internal electrical contacts that transmit electricity to the starter. As electricity is supplied to the starter a small gear comes out and engages the flywheel to spin the engine over as you turn the key. When this fails, it may cause a clicking sound and will not allow the starter to engage the flywheel when you turn the key. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

The most common reasons a Kia Rio won`t start are a dead battery, an alternator problem, or failed starter. Search our network of RepairPal Certified shops near you to speak with a technician about your issue.
If your vehicle won`t start, it`s usually caused by a dying or dead battery, loose or corroded connection cables, a bad alternator or an issue with the starter. It can be hard to determine if you`re dealing with a battery or an alternator problem. Here`s how to know which one is the culprit.
Your Car Starts Intermittently

Dirty or loose wiring could be behind your problem. An electrical component like a damaged relay could cause it to fail and work under different conditions. Even if this only rarely happens, it`s a good idea to take it in as soon as you can secure an appointment.

If the starter engages but does not disengage when you let go of the key, the solenoid is likely bad and the starter may suffer significant damage as a result. Sometimes your car starts, sometimes it doesn`t. Intermittent operation can be a sign of a failing starter solenoid.
Check the fuel level. With the ignition switch in the LOCK position, check all connectors at the ignition coils and spark plugs. Reconnect any that may be disconnected or loose.
Broken Starter: If you`ve put your key in the ignition and hear a clicking noise when trying to turn the key then your starter has likely gone bad. Clogged Fuel Filter: If everything else in your vehicle feels fine but you`ve found yourself with trouble starting the car, you might have a clogged fuel filter.
If the car clicks when trying to start, but still won`t start, this can be caused by a weak battery, dirty battery terminals, a worn starter motor or a stuck solenoid. If might just need a jump start, but there are a few tricks to try before breaking out the jumper cables or electric jump starter.
A classic reason why your car starts for a second then dies is battery depletion. The car needs electricity from the battery to start. However, if your car starts then dies immediately, then the fault could be a lack of charging or damaged battery.
If the car clicks when trying to start, but still won`t start, this can be caused by a weak battery, dirty battery terminals, a worn starter motor or a stuck solenoid. If might just need a jump start, but there are a few tricks to try before breaking out the jumper cables or electric jump starter.
Failing Battery or Starter Motor

If a battery is low on energy, or if the connections are loose, your engine may be able to crank, but it may not start–or it may take several tries. Similarly, a starter motor that`s beginning to fail may still crank the engine, but won`t be powerful enough for it to start.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Car will not crank after putting in a new starter. Forced starter to start up and engine starts but stalls out. Will the security continue to cut off fuel while force starting?
ANSWER : Hi there. Forcing the starter to engage to make the engine run without the ignition engaging the starter will continue to keep the security on. This is a safety feature that keeps people from stealing your vehicle. I recommend replacing the ignition switch and checking the wires to make sure that they are all tight and clean. If you need further assistance with diagnosing your ignition problem, then seek out a professional, such as one from Your Mechanic, to help you.

My car will not start Intermittently. I purchased a new battery 2 weeks ago and yesterday the car wouldn’t start. Got a jump and
ANSWER : The issue you are having is probably due to an intermittent fault in the starter motor itself or a deficiency in the starter electrical circuit, for example a large voltage drop due to a poor ground or a high resistance connection. These issues can be readily diagnosed and resolved on a mobile basis if you request a hard starting diagnostic. If you request that diagnostic, the responding certified mechanic will get this resolved for you promptly. Based on Toyota’s Factory Service Manual, the battery should not be disconnected if the vehicle engine is running. The battery acts as a large resistive voltage sink and consequently taking the battery out of the circuit, while the alternator is still running, can create a voltage spike on the car’s electrical system which is not good for voltage sensitive components such as the engine computer. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

My car won’t start, neither does my auto. Start. Sometime it might start if I jump it sometimes it won’t.
ANSWER : Hi there. There are a number of issues that will make a car hard to start. Everything from the electrical system to the fuel system to the actual starter itself can be the problem. Finding the root cause of a hard starting engine can take some investigation. Ignoring a hard starting issue can further damage the vehicle, which will often result in a more expensive repair. You might want to have a mobile mechanic complete a car is hard to start inspection so they can pinpoint the source of the issues you’re having and recommend the right repairs be completed.

Map sensor car won’t start up good ?
ANSWER : Your MAP sensor is an important input for your computer. It helps determine the load on the engine to calculate the correct amount of fuel to inject. It sometimes takes a few seconds for the vehicle to realize that the sensor is not producing a good signal.

At that point, it will use other methods to determine the fuel rate, such as pre-programmed fuel maps, throttle position, etc. I would suggest replacing the MAP sensor and retesting. If you would like to have it checked first, a certified technician from YourMechanic will be able to scan your vehicle and test components to determine the root cause of your starting issue before making a repair.

The starter off and on wont turn over when trying to crank the car.
ANSWER : Hello, thank you for writing in. Often when starters are installed they come with a shim. These shims need to be installed to help hold the starter at the proper angle. If the angle is off the gears may not mesh correctly putting excess pressure on it that the starter cannot compete with. If the starter did not come with a shim, or you do not have it anymore, you can likely purchase or fabricate one relatively easily. If this does not solve the issue, make sure there are no wires that are being pinched or shorted out when the full weight of the car is being supported. For more help diagnosing the issue, contact our service department to schedule an appointment. And thank you for you service to our country.

My car only starts sometimes. is it my starter switch?
ANSWER : What you are describing sounds like a faulty starter solenoid. If you hear a clicking sound when turning the key, it is likely that your starter solenoid may be faulty. The starter solenoid is located on the starter and has internal electrical contacts that transmit electricity to the starter. As electricity is supplied to the starter a small gear comes out and engages the flywheel to spin the engine over as you turn the key. When this fails, it may cause a clicking sound and will not allow the starter to engage the flywheel when you turn the key. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

Slight delay after engaging the starter before it starts and sometimes will not start at all
ANSWER : What you are describing sounds like a faulty starter solenoid. If you hear a clicking sound when turning the key, it is likely that your starter solenoid may be faulty. The starter solenoid is located on the starter and has internal electrical contacts that transmit electricity to the starter. As electricity is supplied to the starter a small gear comes out and engages the flywheel to spin the engine over as you turn the key. When this fails, it may cause a clicking sound and will not allow the starter to engage the flywheel when you turn the key. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

car hesitates when trying to start the car ,but when started then i shut car off and start again it will start right up
ANSWER : Hi there:

Sometimes when you have problems starting an engine initially it is caused by a restriction in fuel flow; caused either by clogged fuel injectors or the throttle body that needs to be cleaned. Once the fuel starts to flow and engine warms up, it’s much easier to start. However, it could also be an air filter, EGR valve or other components that causes this issue as well, which is why it’s best to have a professional mobile mechanic complete a car is hard to start inspection so they can pinpoint the source of this issue.