Q: Car will not start after alternator replacement?

asked by on

My alternator was grinding & needed to be replaced. Was on my way home to do just that & it died. Car had to be towed. Replaced the alternator, charged the battery & car would not start. It kind of made a small backfire sound or "poof" noise. I thought maybe the spark plugs got fouled, so I replaced those too. Charged the battery again & tried to restart the car. Nothing. It cranks, but does not seem to try & fire up? Checked the fuel pump reset in the trunk, but it was not tripped either. What else could be the issue? I need this car for work and any help is much appreciated. Thanks!

My car has 120000 miles.
My car has an automatic transmission.

The backfire sound usually indicates a misfire of some kind which may be related to a timing issue such as a faulty ignition coil, bad spark plug wires or a faulty crankshaft position sensor. This may also possibly be related to a fuel supply issue as well such as a faulty injector connection or voltage creating a lean fuel condition which can also cause a misfire. A certified YourMechanic technician can be dispatched to your location to help inspect your vehicle’s starting issues and suggest any necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Car will not start after alternator replacement?

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: Car squealing and growling.

Hello, From the way you describe you noise, the first thing I would take a look at is the power steering fluid level. If the level is low, there is probably a power steering leak that needs to be repaired....

Q: After replacing the window regulator in my 2002 Ford Windstar the window goes up crooked.

Hi there. The window regulator is loose or the window is off the window regulator causing the window to go up crooked. Remove the door panel and check the window regulator and see if it's not mounted properly. If the...

Q: 2004 f150 4.6l 2v was over due for oil change started making ticking noise checked oil very low. whats making the ticking noise?

Hi Mike. Thanks for contacting us today. The ticking noise is typically caused by low oil levels or low oil pressure problems due to excessive wear and tear with oil pump or dirty oil. In most cases, simply having 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...
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...
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.