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?
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: Stuttering with check engine light

If you are having an electrical system problem that is causing the lighting and other systems to have erratic issues then you need to check the alternator wire connections on the back of the alternator for loose or bad connections....

Q: Thumping noise after replacing motor mounts & tranny

Hello. The thumping noise that you hear is probably coming from one of the motor mounts that was replaced. The bolts that hold the mount down could be loose or it is possible that one of the mounts are defective....

Q: High RPM, cannot shift gears on 1998 Lincoln Mark VIII

Hello. We will be happy to assist you with your 1996 Lincoln Mark VIII. I suggest to have the vehicles computer scanned and trouble codes retrieved by a technician. Being that the Check Engine Light comes on when the problem...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...