Bad Battery Symptoms If the cranking of the engine is sluggish, like your vehicle is harder to start on cold mornings, it starts inconsistently, or there’s no sound and interior lights when you try to start, suspect a failing battery, a loose or corroded connection or electrical draw.
What does it mean when your car sputters but wont start?
The lowly spark plug could be the culprit for your car that won’t start. A spark plug allows a controlled spark to ignite the fuel in your engine. Without it, your car won’t be able to operate. If your lights and radio will turn on but your car is sputtering or won’t start at all, you may have a defective spark plug.
How do I know if my battery is bad or my alternator?
If your engine won’t turn over or takes far longer than usual, it’s time to grab the jumper cables and attempt a jump-start. If your engine starts and stays running but won’t start again later, it’s likely a battery problem. If your vehicle immediately stalls, it’s probably a bad alternator.
What does a faulty alternator sound like?
Alternator Whining Noise
A common sound made by failing alternators is a very high pitched whining noise that you’ll hear when the engine is running. When the RMPs increase, such as when you accelerate, you’ll hear the noise get higher in pitch as the pulley spins faster.
Is it the starter or the alternator?
The alternator converts mechanical energy into electrical energy allowing the car to charge the battery while you are driving. The starter works in a different way converting electrical energy of the auto into mechanical energy. Both the alternator and starter can wear out over time needing repair or replacement.