What causes a car not to start if the battery is good?

What causes a car not to start if the battery is good?

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.

Why is my cavalier not starting?

The most common reasons a Chevrolet Cavalier won’t start are a dead battery, an alternator problem, or failed starter.

Why won’t my car start but has power?

A failure of the starter motor can be a reason why your car won’t start but has power. To confirm that it is indeed a starter motor issue, you can diagnose a dead battery or alternator. If these are working, and the engine won’t crank at all, the starter motor is most likely your culprit.

What sensors can cause a car not to start?

A bad Crankshaft Position sensor is a common cause of no starts. The signal from this sensor goes to the PCM or ignition module that switches the ignition coil(s) on and off. If you have an RPM signal, a bad ignition module or PCM may not be switching the coil(s) on and off.

Why does my car not start after driving?

1. Fuel Pump Has Gone Bad. The most common reason for a car not to start after it has been sitting for a period is that the fuel pump isn’t doing its job. So, once the fuel pressure has dropped while the car sits, the engine won’t be getting enough fuel when you try to start it.

What do you do when your car won’t turn over?

Here are some things to try if your car won’t turn over.

1. What To Do If Your Car Won’t Start:
2. Try: Cycling the Key.
3. Try: Tapping on the battery Terminals.
4. Try: Smacking the starter.
5. Try: Shifting the Shifter.
6. Try: Swapping Relays.
7. Try: Smacking the Fuel Tank.
8. Try: Un-flooding a flooded engine.

Why wont my car start but the radio and lights work?

If the lights and/or the radio come on but the car does not start, you may also have dirty or corroded battery terminals. The terminals are what connect the electrical system to the battery. If you can get the car started by jumping it, it’s a good bet that your battery was the problem.

How do you diagnose an engine that won’t start?

Diagnose: Why Won’t My Car Start

1. 1) Is the engine cranking?
2. 2) Check the trouble code memory.
3. 3) Check the crankshaft/camshaft sensors.
4. 4) Check the fuel pressure.
5. 5) Check the spark from the ignition coil.
6. 6) Check if the injectors are opening.
7. 7) Check the crankshaft/camshaft timing.
8. 8) Check compression/leak down test.

Can a blown fuse cause a car not to start?

Usually, a blown fuse just causes a minor car electrical problem, like backup lights or interior lights not working, not being able to use your radio, losing a turn signal, or some of your climate control features not functioning properly. In rare cases, though, a blown fuse can mean that your car won’t start.

Is there a fuse for the ignition switch?

The ignition relay is one of the most important electronic relays found on modern vehicles. It is usually located in the fuse and relay panel beneath the bonnet, and is responsible for providing power to the vehicle’s ignition system, and some of the fuel system’s components.