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
  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: Gas reset button location

Hello. Diagnostic trouble code P1631 is an indication that the theft deterrent password is incorrect. The theft deterrent feature for your vehicle will shut off the fuel to your car until the proper password is sent to the PCM. A...

Q: Misfire

You should have the computer checked to get the misfire codes to what cylinder is misfiring and check for spark from that coil and if you have spark at the coil then have compression on the engine to see if...

Q: Someone poured corn syrup in my son's Jeep Sahara 2013. How long does it take to run through to the fuel pump? Police are looking

Hi there. Sorry to hear this has happened to you. Generally speaking, when sugar or syrup is poured into a fuel tank, the best way to reduce damage to internal engine components is to remove the fuel tank and fuel...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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...