What Can Cause A BMW To Not Start?

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

Bad Ignition Switch – If you know your battery is working properly, but your car doesn’t turn over on the first few tries, you might have a problem with the ignition switch.

Broken Starter – Similar to a bad ignition switch, a broken starter is another common reason your car won’t start..

Will low oil cause BMW not to start?

Low oil levels can cause the engine to seize, or not turn over. An engine seizing because of no oil often results in the engine being taken apart. Not only can low only levels cause a car to not start, but it can also damage the engine.

Why do trucks take longer to start?

A drop in pressure can be caused by a faulty regulator or a weak pump, or by a clogged filter or injectors. The ignition system provides a spark to ignite the fuel in the engine. … Worn-out spark plugs will have a difficult time igniting the fuel in the engine, which will result in longer cranking time.

Why does my engine turn over but not start?

When your engine cranks but won’t start or run, it could mean your engine is having trouble producing a spark, getting fuel, or creating compression. The most common causes are problems in the ignition (for example, a bad ignition coil) or fuel system (for example, a clogged fuel filter).

What are the signs of a bad starter?

What are common bad starter symptoms?Something sounds off. One of the symptoms of a bad starter is a clicking noise when you turn the key or push the start button. … You’ve got lights but no action. … Your engine won’t crank. … Smoke is coming from your car. … Oil has soaked the starter.

Why does my car take multiple times to start?

Hello – most likely, your hard starting is caused by a malfunctioning fuel pressure check valve, or fuel pressure regulator. … A leaking check valve makes the fuel pump work harder, and run longer when cranking, before adequate fuel pressure is available for the injectors.

Why does my BMW take long to start?

There is a little check valve in the fuel pump and fuel filter that doesn’t allow fuel to bleed back to the tank. If it is bleeding back you will have a long crank time while the pump is trying to build up fuel pressure again. … This would also cause low pressure in the fuel system, like Robert mentioned.

Will putting oil in my car make it start?

If you have added oil to that vehicle before, or pretty much any other car, it shouldn’t have anything to do with starting. If you added oil in a normal manner, then ignore it, and diagnose your current problem – starter, battery, ignition, fuel. You said it turns, so probably not battery.

Can old oil cause car not start?

Although dirty or contaminated oil can cause problems (with variable valve timing mechanisms for instance), dirty oil generally won’t prevent a car from starting. “Bad” or old gasoline could prevent a car from starting though.

What causes a car to take a long time to start?

A: Possible causes: a marginal battery, a poor connection in the starting circuit or starter, a charging-system problem, or the battery is being drained while the car’s parked. … If the slow cranking occurs after driving (engine hot), it’s likely a faulty starter or poor charging.

What do you do if your car wont start but it’s not the battery?

Try: Cycling the Key If your car turns on but won’t start, turn on the dome light and watch it while you try to start the engine. If the light goes out, it’s a sign the battery is really weak—almost dead. To heat up the battery, terminals and starter, try the “key cycling” trick.