There are few things as frustrating as climbing into your car, turning the key, and hearing… nothing. Or perhaps just a repetitive clicking. When your car won’t start, it’s not just an inconvenience; it can throw a wrench into your plans for the day. Fortunately, many common starting problems are relatively easy to diagnose and fix. This guide will lead you through a systematic approach to troubleshooting why your car isn’t starting so that you can either fix it yourself or talk to your mechanic with confidence.
The Silence of the Engine
When you turn the key and the starter does nothing at all, here’s what you need to do:
Step 1 – Check the Battery
The battery is often the culprit, especially in cold weather. Look for signs of corrosion around the battery terminals that could be preventing a good connection. If the connections are clean, use a multimeter to test the battery voltage. It should read around 12.6 volts for a fully charged battery. If it’s significantly lower, your battery may need to be replaced. Jump-starting the car could get you going, but have the battery and alternator checked by a professional as soon as possible.
Step 2 – Inspect the Starter Motor
If the battery is fine, the next thing to check is the starter motor. Tap on the starter with a tool like a hammer while someone else turns the key. If the car starts, the starter may be on its last legs and will likely need to be replaced. You can also test the starter by using a voltmeter. Connect the positive lead of the voltmeter to the positive terminal of the starter and the negative lead to the starter’s case. If the voltmeter reads 0 volts while the key is turned, the starter is not getting power and the problem may lie in the ignition switch or a related wire.
Step 3 – Investigate the Ignition Switch
The ignition switch is a common source of no-start problems. It’s not the physical part you put the key into, but rather an electrical switch that is triggered by the key turning. If you suspect a problem with the ignition switch, have a professional mechanic diagnose it as it involves disassembling the steering column and can be quite complex.
The Clicking Conundrum
If you turn the key and hear a rapid clicking noise, it often means there’s not enough power to engage the starter. Here’s how to handle it:
Step 1 – Check Battery Connections
Loose or corroded battery connections can cause a clicking sound and prevent the starter motor from getting the power it needs. Ensure that the connections are tight and clean, and that the metal is not damaged or worn.
Step 2 – Assess the Battery
Just because the battery has enough power to run the lights and radio doesn’t mean it has enough power to start the car. Test the battery using a multimeter as in step 1, and consider jump-starting the car from another vehicle.
Step 3 – Inspect the Starter
If the battery is in good condition, the starter could be at fault. Presuming the battery connections are good, a single solid click indicates that the starter solenoid is receiving an electrical signal but the starter itself is not operating.
The Engine that Cranks But Won’t Start
If the engine cranks (you hear the rr-rr-rr of the starter), but doesn’t fire up, you’re likely dealing with an issue in the ignition, fuel, or air delivery systems.
Step 1 – The Fuel Pump
The fuel pump delivers gas to the engine, so a faulty fuel pump could prevent the car from starting. When you turn the key to the “On” position, you should hear a faint whirring noise; if you don’t, the fuel pump may be the issue. Keep in mind that the fuel pump’s location can affect the level of difficulty in replacing it and varies between vehicles.
Step 2 – The Ignition System
The ignition system includes spark plugs, ignition coils, and the distributor. Check that the spark plugs are properly connected and are not worn. Test the ignition coils with an ohmmeter. Each coil should have a specific resistance level. If a coil is out of specs, it’s likely faulty. The distributor can fail as well; it’s not as common in modern cars but could be the issue if your car is older.
Step 3 – Air Delivery
The engine needs air to run, and that air needs to come through a clean air filter. If the air filter is clogged, the engine can’t get the air it needs to run properly. Check the air filter and replace it if necessary.
Stop by a Scott’s Automotive Location Near You
Car not starting can lead to a range of emotions from anger to anxiety but staying calm and methodically diagnosing the issue can often lead to a quick resolution. Remember, when in doubt, consult with a professional mechanic at Scott’s Auto. They have the tools and experience to diagnose and fix the problem correctly. To find a location near you, click here!