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?
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. I hear the fuel pump coming on but sometimes it won't start

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 engine revs way up immediately upon starting engine.

Common causes of high RPM excursion at start-up are typically: large vacuum leak, throttle plate stuck open, cruise control stepper motor stuck in one position; faulty throttle position sensor, and/or faulty idle air control motor or solenoid. If you request...

Q: Leaking exhaust

In my experience, I have found that it is not uncommon for Jeeps to develop exhaust leaks over time. The most common exhaust leak can be found in the the gaskets between the various exhaust joints, which are held together...

Q: Passenger seatbelt stuck and won't unlock

Hi Alonna. Thanks for contacting us today. I'm a bit confused with the question. If the seat belt is locked inside the latching mechanism, then it might be possible to unlock the seatbelt by pressing down on the belt and...

Related articles

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...
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...
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.