Skip the auto shop - Our mechanics make house calls

Q: Fuel pump not working, changed it, also new battery and alternator , still no fuel pumping

asked by on

Fuses all good, jeep turns over but still no fuel coming. Brand new fuel pump... Second one also.
My car has an automatic transmission.

Hi there. Are you getting battery voltage at the fuel pump? Double check the fuses with a digital volt/ohm meter and measure voltage on both sides of fuse to verify continuity. Your fuel pump circuit should have a relay or circuit breaker. If the fuses check good, but there is no voltage at the pump then the relay could be faulty. The PCM provides the ground to turn on the relay and this component could also be faulty; does the check engine light work? It appears that a 20amp fuse in the power distribution block provides the voltage to the relay and when activated the relay literally relays the voltage to the pump. I suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a no start inspection.

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!
  • Home
  • Questions
  • Fuel pump not working, changed it, also new battery and alternator , still no fuel pumping

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 won't start with new battery

This may be related to many different possibilities, some of which may be related to a lack of spark and some of which may be related to a fuel delivery problem or a combination of both. For example, if the...

Q: knocking

Hi there: When the AC is on, it creates additional strain on the engine. As the engine needs to work harder to produce the same HP while the AC is on, in some cases, loose cylinder head components like valve...

Q: Clutch making sound

There are a few different reasons for a clutch to make noise when being used. It is possible that the throwout bearing is causing the noise, but it is also possible that the clutch assembly is worn out, the pilot...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.