Q: Troubleshooting the fuel pump

asked by on

I replaced the fuel pump about 2 years ago. I had to remove the intake manifold to replace a broken check valve and a broken vacuum chamber which were located underneath the intake manifold. After reinstalling the intake manifold, I had a no start situation. I checked the plugs to make sure I had fire to them, which I did. I took the fuel line loose at the injector rail to check for fuel supply. Nothing comes out with the key in the on position, but a little gas comes out when I turn the engine over. Before I drop the gas tank, I was wondering if gas shouldn't be coming out with the key in the on position.

My car has 135000 miles.
My car has an automatic transmission.

Hello - qualified "yes" on this. The fuel pump should run for at least a second or two to pressurize the fuel system. I recommend double-checking fuses for the fuel pump and the engine management computer, the fuel pump relay (best to check voltage coming out of the relay when it is operating. Engine management may not be turning on the fuel pump for some reason as well - check the fuel pump relay to be sure it’s getting "signal" voltage to turn on power to the pump. For assistance with this problem, I would recommend having a car is not starting inspection completed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

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. Troubleshooting the fuel pump

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 truck won't rev past 1000 RPM

The mass air flow sensors are known to go bad on Nissan Titans. The symptoms you are describing point to the MAF not working properly. Check to be sure you have reconnected the new one correctly, proper continuity and grounds....

Q: Car horn going off in the middle of the night

It is possible that horn button may be sensitive to the change in temperature and be making contact in the night when the outside temperature changes. I recommend seeking a certified mechanic, like one from YourMechanic, to come and test...

Q: Hazard light switch fell into dashboard

It sounds like the clips that hold the switch have broken. I would recommend having the hazard switch replaced by a certified technician.

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
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...