Skip the auto shop - Our mechanics make house calls

Q: I hear the fuel pump coming on but sometimes it won't start

asked by on

If I can hear the fuel pump coming on then that's not the problem right?

Just because you hear the fuel pump run does not mean it is pumping the correct pressure to the injection system. If the pressure is real low or the filter is plugged solid, then the pump may not get enough fuel to the fuel rail. The only way to know is to test the fuel pressure at the fuel rail test port. When you are having the no-start, the engine should be checked for fuel pressure and spark to the spark plugs. On your Jeep, the most common problem is the crankshaft sensor or the fuel pump being bad. If you need help, then contact a mechanic to come and help diagnose the starting problem.

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!

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: Engine died then started up fine

This problem could be unsafe for you. I recommend contacting a certified mechanic, such as one of the mobile mechanics from YourMechanic, to thoroughly inspect your vehicle at your home or office. They can do a thorough check for possible...

Q: My driver side door lock only works intermittently

Hi there. There should a rod connecting the door lock cylinder to the lock assembly that is held in place with a plastic clip. These clips do become brittle over time and can break easily, whether by using a slim...

Q: Would performing a heater core bypass give my AC colder air in my 2001 Jeep Wrangler

Hello. Unfortunately this will not help. If the blend doors under the dash are working fine then the heater core should be completely blocked out when the a/c is on. If the system is functioning properly and the system pressures...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...