Q: How can i check a bad fuel pump before replacing one.

asked by on

My van stalled at a stalled at a stoplight and now wont start.It still cranks over but no start.It seems like its about to start and makes alow poping noise like its burping.si i changed the fuel filtr but while changing filter i noticed not much gas was coming out of fuel lines and ther is gas in the tank.still no start .when i turn key the fuel pump seems to turn on for couple seconds as normal but still not starting does this sound like a bad pump or something more serious.the van has been running fine til this happend.

My car has 187567 miles.
My car has an automatic transmission.

Hello. The best way to test the fuel pump is to test the fuel pressure. You can do this by hooking up a gauge to the vehicles fuel test port. This is an in-line gauge that will tell you what the pressure is when the vehicle is running or attempted to be starting. If the pressure is below manufacturer specification then you will need to replace the fuel pump. Always replace the fuel filter when replacing the fuel pump. This will ensure that the fuel system can flow as designed. The fuel pump relay is part of that system that will pop and fail immediately like you have described. You can test it, or replace it with a known good one to test it. Another quick test you can perform is to spray some starter fluid into the air ducts and see if the vehicle performs any differently. If the vehicle starts or attempts to start better than before, then you have a fuel delivery issue. Keep in mind this could be related to the fuel injectors as well. Test the fuel pressure and go from there.

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. How can i check a bad fuel pump before replacing one.

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: Bought this 01 xterra in oct and have had no problems until today. It started huccuping and jerking while driving, now wont start

The problem does sound like the fuel pump went bad and not pumping fuel. It will take a fuel pressure test to find out if that is the problem or another issue like a crankshaft sensor or something like that....

Q: Loses power 60 mph

Hi! I believe your problems are unrelated and not caused by one another. I think it's more so awkward timing that both present problems than anything else. You may be in need of a tune-up. I suggest that you have...

Q: After repairs, SUV stalls after deceleration and idles

Using a scan tool to access any stored diagnostic trouble codes (DTCs) may give you some direction on this. I recommend cleaning the throttle body. TAC (throttle actuator control) or drive-by-wire throttles are very sensitive to dirty throttle bodies. You...

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.