Skip the auto shop - Our mechanics make house calls

Q: My car wont start

asked by on

My car went dead tried to jump it off and didnt work. Got a new battery still wouldnt start.. put a starter on it still nothing.. found out altanater was bad put a new one on still wont start.. a few days before this my lights was blinking when i was driving.. and car act like it didnt want to start.. i have spent alot so far on it now the guy working on it says its a ecm computer.. i just want to know what you think..

My car has 100000 miles.
My car has an automatic transmission.

Hi there:

Usually a hard to start issue is rather simple to diagnose when you begin by downloading all stored trouble codes in the ECU. If you can’t connect to the ECU; there is your problem. If they are able to, they can determine if the issue is electrical (meaning an electrical connection or relay) or mechanical (broken starter, ignition relay or other). However, if you have a professional mobile mechanic complete a car is hard to start inspection, they’ll complete these steps and be able to pinpoint the source of your BMW’s starting problems and recommend the right repairs. Unless you accidentally connected battery cables in reverse during a jump start or battery installation, I doubt that the ECU is damaged.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Emergency brake rusted to wheels

Hi. I'm not exactly sure what you mean, but the parking brake cable may be seized. Rust on the face of a brake rotor or brake drum is normal and not a cause for concern. It looks like your parking...

Q: My battery's dead and somebody is giving me a jump and it's not working

When jump starting your battery, you need to ensure that you have good metal to metal contact on both ends of the jumper cables. It could also be that your battery is toast. I recommend removing your battery and having...

Q: oil is leaking

Unfortunately, the oil leaks are only going to get worse over time. The major leak you would want to address would be the valve cover gasket. These are known to leak along the half moons at the rear of the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.