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Hey, Why Won't My Car Start?

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Four common causes for a vehicle not starting and their related parts.
Starting your engine requires several things to happen. One, your battery needs to have enough voltage and current to run the starter motor. The electrical connection between the battery and starter motor needs to have good continuity. The starter motor needs to be in good enough shape to have enough power to rotate the engine fast enough for fuel and Spark to be generated. There also has to be enough fuel to be delivered to the injectors and still enough power in the battery to ignite the spark plugs. When all of these events happen correctly when you turn the key the engine starts.

Is Your Car Not Starting?

Your car isn’t starting because of a battery problem. The battery might have died or has corroded terminals; this could be caused by the battery being old or feeding a parasitic draw (faulty accessory being active even after shutting off the car). Alternatively, it can be an alternator or starter issue....read more

Your car isn’t starting because of a battery problem. The battery might have died or has corroded terminals; this could be caused by the battery being old or feeding a parasitic draw (faulty accessory being active even after shutting off the car). Alternatively, it can be an alternator or starter issue.

Your car is a valuable asset and an essential part of your daily life. However, if it the engine cranks but the car doesn't start, something may be wrong. Ignoring it could lead to costly consequences, so taking control of the situation and understanding the causes and solutions is crucial.

Don't wait for the problem to escalate. By addressing the issue promptly and seeking professional assistance, you can avoid costly repairs, maintain the integrity of your vehicle, and ensure a safe and reliable driving experience. .

Let's Get To The Bottom Of It!

  • Q: Is your vehicle making a clicking noise instead of starting?
    You may also notice the smell of burning wires or the engine starting but dying right after. ...read more

    You may also notice the smell of burning wires or the engine starting but dying right after.

    The starter motor is a small electric motor that helps the engine run. It uses gears to spin the engine fast enough to start running independently. If the starter motor doesn't work, you may hear a clicking sound when you start the car, but the engine won't turn over. This could be due to a problem with the contacts in the starter, which connect the battery and the starter motor.

  • Q: Is the engine sputtering and dying right after you try to start the car?
    The fuel system in a car needs enough pressure for the injectors to spray fuel into the engine. T...read more

    The fuel system in a car needs enough pressure for the injectors to spray fuel into the engine. This creates the right mixture of air and fuel to keep the car running. If the fuel level in the gas tank gets too low, there won't be enough pressure to keep the engine running, and it may only start and stop or sputter, dying immediately after.

  • Q: Is the engine cranking slowly when the car is starting?
    The engine might also be cranking pretty weakly or not at all. Also, the battery light might flas...read more

    The engine might also be cranking pretty weakly or not at all. Also, the battery light might flash on the dashboard, and the battery terminals might look corroded.

    Battery cables connect the battery to the rest of the car's electrical parts. Corrosion can get them after years of use. Corrosion on the terminals creates more resistance, reduces current and voltage, and slows the starter motor's ability to crank the engine.

  • Q: Does the dashboard lit up, but the car stays silent, and the engine doesn't react?
    The ignition switch is like a switchboard for your car. It tells the accessories, like the lights...read more

    The ignition switch is like a switchboard for your car. It tells the accessories, like the lights and gauges, when to turn on and start the engine. However, if the switch wears out or is damaged over time, it can cause a problem with the electricity flow. Consequently, the accessories might turn on, but the starter doesn't, so the gauges and lights work, but the engine doesn't start.

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Vehicle Health Inspection Proof

Explore the following typical inspection results that show a potential cause for the symptom and select the one you believe is similar to your vehicle's issue.

Faulty starter motor

This proof image shows a starter assembly. In this case, the main component, the starter motor, was faulty and needed replacement.

After towing it, a customer brought in their vehicle because it was having trouble starting. They said it had been hard starting for a while, and all they could hear was clicking. So they tried jumping the vehicle with another car, but it still wouldn't start.

The technician tested the vehicle by tapping on the starter solenoid and having another technician try to start the car. It started immediately, with no other issues noted during the test drive.

During the vehicle health inspection, the technician found that the problem was with the starter solenoid. In addition, they determined that power was going to the starter solenoid but not to the starter motor, indicating that the solenoid was the issue.

The technician concluded that the starter motor assembly needed to be replaced to fix the issue with the vehicle starting.

Does the issue look like this? if not accessible your shop will document it
Empty fuel tank

This image shows a vehicle dashboard. The red arrow highlights the car's low fuel level, which prevents it from starting.

A customer came to the shop after their vehicle had broken down. They were trying to park at the grocery store when the engine started sputtering and jerking, then died. They wanted to restart it, but it only cranked and wouldn't start.

The technician checked the gas gauge and found it empty. So they added 5 gallons of gas to the tank, and the gauge went up to about an eighth of a tank. They cycled the key on and off, then cranked the engine, and it started and ran smoothly.

During a thorough inspection, approved by the customer, the technician didn't find other issues related to the customer's concern. However, they advised the customer to monitor the fuel level and maintain a quarter gas tank so the fuel pump remains in good condition.

Does the issue look like this? if not accessible your shop will document it
Faulty ignition switch

This image shows the internal wiring that connects to the ignition switch. In this case, a starter wire wasn't conducting power, preventing the car from starting.

A customer reported their vehicle wouldn't start. They tried jump-starting it and tapping the starter, but the car still wouldn't start. So, they towed it. The technician had to push the vehicle into the service bay.

During a vehicle health inspection, the technician found no cause for the customer's concern. The battery tested okay. The customer approved additional tests to diagnose the issue, and the technician measured the power going to the starter's command side. They didn't find any power.

The technician then used a remote jumper to the command wire, and the vehicle started. Then, they tested the wire coming out of the start switch that goes to the starter's command side, discovering no power. Finally, after manually applying power to the same wire, the starter engaged, and the engine ran.

This proved that the ignition switch failed internally and needed replacement.

Does the issue look like this? if not accessible your shop will document it
Dead battery

This image shows the car's battery in an odd location. Some cars have batteries below the back seat, which is the case; this one was dead and needed replacement.

A customer came to the service center with a problem. They had trouble starting their vehicle and noticed that the engine cranked slowly. They didn't try to jump-start the car.

A technician jump-started the car using a jump box and drove it into the service bay. They didn't notice any unusual behavior while the car ran.

They conducted a vehicle health inspection and found the battery under the passenger seat. But, unfortunately, the battery voltage was too low even to turn on a battery tester.

The technician charged the battery for 20 minutes and tested it. Unfortunately, the battery failed the load test, requiring replacement. The technician recommended that the customer replace the battery to get their vehicle running again.

Does the issue look like this? if not accessible your shop will document it
Corroded battery terminals

This image shows a dusty and rusty battery. Its terminals were highly corroded in this case, preventing a healthy power flow. This affects the entire battery system.

The customer brought their vehicle because it was hard to start. They were worried the starter was failing because the car was cranking slower than usual. However, it always started and never clicked, apart from the slow cranking.

During the test drive, the technician noticed the vehicle cranked slowly, and the dash lights and dome lights dimmed while cranking. However, they didn't find further issues with the car during the test drive.

During a vehicle health inspection, the technician discovered the battery cable terminals were severely corroded. Plus, a digital battery tester said the battery connection was not good.

They cleaned the battery cable ends and neutralized the acid using a battery cleaner spray and a wire brush. Next, the technician reinstalled the battery cables and tightened them. Then, they retested the battery, starting, and charging system, which all passed. Therefore, no further repairs were necessary.

Does the issue look like this? if not accessible your shop will document it
Bad alternator

This proof image shows an alternator. In this case, the mechanic checked the voltage where the green arrows point. However, the alternator was faulty affecting the car's electrical system, requiring replacement.

A customer reported that their car's headlights dimmed, and the battery light flashed on the dashboard while driving. The engine also cranked slower than usual, and the car wouldn't start the next day. The technician had to jump-start the vehicle to bring it into the shop.

Upon vehicle health inspection, the technician found that the battery was low on voltage and needed to be charged. After charging the battery, it tested okay. Still, they didn't see the issue's root cause, so the customer approved additional tests.

Further diagnostics showed that the charging system wasn't working correctly. Finally, the technician tested the alternator and found an internal failure that needed replacement.

The technician verified this by checking the voltage at the battery lug and again while the engine was running, checking the alternator. This confirmed that the alternator was the cause of the problem and needed replacement.

Does the issue look like this? if not accessible your shop will document it

Typical Fixes to Address the Cause(s)

The following chapters bases themselves on experiences from our auto repair shop; we'll describe related problems' causes and fixes.

"Alternator Replacement" fixes "Bad alternator"

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Hey, Why Won't My Car Start?
Sometimes a problem is more challenging to describe than it initially looked like. If you are not sure your problem is described by this article, please find below similar vehicle symptoms, which might describe better the issue you are experiencing.

Other things your auto repair shop might talk about:

Fire. Search. clogged fuel filter. tow truck. faulty neutral safety switch. steering wheel. flooded engine