Skip the auto shop - Our mechanics make house calls

Q: Bubbling battery

asked by on

Replaced starter, battery, and alternator. After starting truck, general light comes on dash, the battery bubbles, and the alternator gets fried. Have replaced battery and alternator again and same thing happens. Could it be the ECM?

My car has a manual transmission.

A: Hi, thanks for your question. This may be l...

Hi, thanks for your question. This may be likely related to the voltage regulator. This is a unit that regulates the charging of the battery by the alternator. When this is not working properly, it can undercharge or overcharge (this sounds like your issue) the battery. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Car not starting due to clutch

The switch is there for safety reasons and should under no circumstances be bypassed. It keeps the car from starting if the clutch pedal isn't being stepped on. The last thing you want it for you or someone else to...

Q: Battery regularly dies, alternator working

Hello! From what you mentioned, an electrical test has to be performed for a parasitic draw (something using too much power with car off) in order to determine the issue. The battery is designed to withstand a small amount...

Q: Fuel vacuum line

We would need to know the exact code your vehicle is setting. The code should have a complete pinpoint test done to locate the problem. Once the tests are done, then the system can be fixed. Driving the vehicle with...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...