Skip the auto shop - Our mechanics make house calls

Q: Replaced alternator but still not sending power to the battery.

asked by on

I replaced my alternator. Afterwards, car cranks but battery still receiving power from the battery. Had alternator tested and it passed. And recently when I try to crank it, it doesn't fire up, just spins.

My car has 195000 miles.
My car has an automatic transmission.

A: Hello. If your engine is able to crank all ...

Hello. If your engine is able to crank all the time and will not just start, the issue is not in the battery or the alternator. A good battery charge is required in order to even get the starter to turn the engine over. After the starter turns the engine over, the fuel starts getting introduced into the engine and the spark plugs start firing. Therefore, in this particular circumstance, I believe you have a fuel or an ignition issue. I would recommend enlisting the assistance of a qualified technician to to a fuel pressure test and an ignition test on your vehicle to determine if the fuel pressure is within specification and if the spark plugs are actually firing. If either of these are not the case, you have an ignition of fuel issue that needs to be resolved. For a more in-depth diagnose, consider having a certified technician, like one from YourMechanic, diagnose your vehicle’s loss of power to have this corrected.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: My car won't start back up after idling and won't read codes

With the car idling for an extended period, your engine compartment will get extra hot and this may cause the ignition module to fail, resulting in a stalled engine that will not restart. In order to determine whether the ignition...

Q: I have a 1996 infinity Q45 and the ECM (computer) isn't working. I've been looking on the internet to find a new one.

Hi there. When looking for an ECM (computer) for your vehicle, as long as the computer is the same design and has the same harness connections it will adapt to your vehicle. The only thing is, you will have to...

Q: VTC problem - 2008 Infiniti FX50S

The engine control system uses the engine oil pressure to control the variable intake valve timing on this model. If the engine oil is low or very dirty it can trigger this type of fault and cause the system to...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...