The car cannot be started randomly

My car occasionally cannot start up. It sometimes runs great while other times it cannot turn over for no obvious reason. It happens randomly and lasts for an unpredictable period of time. When I put the key into the ignition, the car would be unresonsive. If I try again, it can be turned on or not. A few months ago, it happened that it wouldn't start at all for several days. After that, the car had no issues whatsoever. This difficulty starting up happens if I drive all day or after the car sat for a whole day without driving. I had the battery checked. Also, no codes came up when the mec
Experienced mechanics share their insights in answering this question :
It sounds like your ignition switch may have an intermittent failure. I would recommend having your ignition coil tested by a certified technician and replaced if necessary to see if that will fix the issue. Considering that this issue has been occurring for quite some time and it can happen in a number of different scenarios, I think it is part-related rather than conditions-related.

The ignition switch is the piece that you stick your key into and when the key is turned it enables battery power to flow through to the starter. If this does not happen sometimes, the ignition switch may be at fault. I would recommend having a certified mechanic inspect your vehicle’s starting issue to verify the faulty component and make the necessary repairs.

How to Identify and Fix Common car Problems ?

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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.
The most common reason cars don`t start is a dead or faulty battery. Even though most cars run on gasoline, they all require electrical power to function. The starter that cranks your engine to start requires an electrical signal to fire. If something`s wrong with your battery, your car engine won`t turn over.
A dead battery in your key fob means it can`t broadcast the signal the ignition system is looking for. If your car or truck can`t detect the correct signal, then the ignition will remain locked, and you won`t be able to start your car with the fob in your pocket.
This is a sign of a faulty or failing ignition switch. When this begins to fail, this is usually a sign of the contacts inside the switch wearing out. When you put your key in the ignition and turn it, there are a series of tumblers that the notches on the key go through in order to cause the key to turn.
If the switch inside your ignition is stuck, it can continually cause your starter to crank. Faulty wiring or malfunctioning starter parts can also cause continuous cranking after starting your vehicle or removing the key.
A power source is needed to excite the alternator to push start a car without a battery or with a dead battery. If there`s no power, then merely pushing the vehicle won`t start it with no battery. The vehicle will have to be pushed some distance as the pump needs time to add fuel.
Most modern fobs can send a signal to your vehicle from up to 50 feet away. As your battery wears out though, both the range and signal strength will be reduced. If you find yourself having to repeatedly push buttons to lock and unlock doors, that`s another sign that your key fob battery needs to be replaced.
No. Car batteries differ in multiple ways to work with different vehicle`s specifications, and they are generally year, make, model-specific.
Typically, your car can sit about four weeks to two months without driving before the battery dies. The reason your car can sit only for so long before it dies is the fact that your car battery is in use even when you`re not behind the wheel.
Dead battery: A dead battery is the No. 1 cause of a no-start. If the battery is weak, but not totally dead, the starter may turn slowly.
A difficult start could be due to a number of things, from a dying battery to a faulty starter. But if your vehicle has a hard time starting after sitting for just a few hours, it can cause an extra layer of confusion. When this happens, one of the most common causes is low fuel pressure.
If your car won`t start but the battery is good, the most common cause is a faulty starter – though it could also be to do with your fuel. You may have insufficient fuel to get the car going.
Why your car struggles to start but runs fine. There are a number of reasons why your car might be slow to start but runs as-normal once it gets going. Causes can vary from weather conditions to battery health, wiring issues, starter motor concerns and fuel-pump health.
Bad Spark Plugs

If the engine holds compression well, and the fuel system is working correctly, but it still won`t start, that tells us that your car`s spark plugs may not be working. The spark plugs ignite the air/fuel mixture inside the engine`s cylinders. It`s the resulting explosion that actually powers your car.

Why your car struggles to start but runs fine. There are a number of reasons why your car might be slow to start but runs as-normal once it gets going. Causes can vary from weather conditions to battery health, wiring issues, starter motor concerns and fuel-pump health.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

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.

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.

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.

I put the wrong key in my car and a few weeks later my car just shut down and it will not start I believe it’s the computer but…
ANSWER : Hi there. What had happened is the wrong key set the security to the vehicle. This is to prevent the vehicle from starting with the wrong keys. Try removing the battery cables (+) and (-) for 13 minutes. During that time, put the original key in the ignition and turn it on. Activate everything in the car even though there is no power. Then remove the key and hook up the battery cables. The computer should have reset and reset the security. If the security is still being tripped, then I recommend seeking out a professional, such as one from Your Mechanic, to help you

Charging warning light comes on when i turn the key and try to start the car and the car want start but when someone tried to give
ANSWER : Hi there:

If you recently replaced your battery, the issue may be caused by a malfunctioning alternator or other electrical component that comprises the charging system on your Nissan Sentra. The best way to find out which item specifically is faulty, is to have a professional mobile mechanic complete a car is hard to start inspection. This will allow the mechanic to determine the precise source of what’s going on with your Sentra and recommend or complete the right repairs.

My car stutter starts, but only after driving it for a few minutes.
ANSWER : Hey there. This may also be caused by what is called the fuel pressure regulator. This is a unit that helps to maintain the fuel pressure at the proper level. When this is not working properly, the fuel pump may be pumping properly, but the fuel may not arrive at the fuel injectors at the proper psi. When this happens, this can cause a lean fuel condition which may cause the car to hesitate, misfire, or stall. If you would like to have an expert pinpoint the issue, a certified professional from YourMechanic can come to your car’s location to inspect the hard start problem and confirm which repairs are needed.

My car will be starting perfect and when the gas tank gets lower it will start having problems .
ANSWER : Based on the information you gave, it sounds like a possible fuel starvation issue, caused by a partially blocked, in-tank fuel filter or a crack in the fuel pump housing. The remedy would be to replace the fuel pump assembly and filter. The overheating may be caused by several things, including a stuck thermostat, faulty water pump, or even a cracked head gasket. I suggest having a certified technician, like one from YourMechanic, inspect the relevant systems to pinpoint the cause of your vehicle’s hard starting issue and overheating problem.

Push start will not start on a 2012 Dodge Journey after hooking up subwoofers and amp car did start after hookup but never started
ANSWER : Hi there. Unfortunately, we’re unable to offer technical assistance when aftermarket components or electrical upgrades are installed, as there are simply too many different things that could be causing your ignition problem. I would recommend contacting a local audio visual installation company or local automotive shop that completes electrical repairs to get some ideas, or purchase a service and repair manual for your Dodge to review the relay schematic to determine which ones you need to check and replace. This video might help you learn how to check for damaged relays – so you might want to watch it.