Q: Gas tank's fuel pump stops pumping fuel randomly. Both fuel pumps are new, gas tank is clean, and a new fuel filters were installed.

asked by on

engine would idle crazy...would stall out and shut down. found that fuel wasn't being pumped from gas tanks..removed gas tanks..filled with rust..had tanks cleaned, installed new pumps , sending units, replaced all fuel filters, replaced fuel pump on chassis, replaced air filter...ran great a few days , then stop running. checked to find pumps were not running. a day later it runs fine . then randomly shuts down. any ideas ?

My car has 58700 miles.
My car has an automatic transmission.

Hello. The first thing to check when you have complete failure of the unit is the power supply. If the wiring going to the pump is loose or has a short somewhere, the power wont be delivered or will be spotty.

You should also check other electronic components in the circuit. This includes the fuel pump, fuse/relay, and the actual terminal that connects to the pump. Intermittently failing is usually a sign that the pump is going bad, and it is not impossible to get a "new" pump that doesn’t work.

If further investigating proves the related components are fine, don’t rule that out as an option. The best way to assure the pump is getting power is to check for voltage with a voltmeter at the pump’s terminal.

To avoid any unnecessary repairs, consider YourMechanic, as one of our mobile technicians can come to your home to properly diagnose your car’s stalling issue.

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. Gas tank's fuel pump stops pumping fuel randomly. Both fuel pumps are new, gas tank is clean, and a new fuel filters were installed.

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: Getting codes P0171 and P0174 with Service Engine Light on.

P0171 and P0174 say the system is too lean on both banks. That means that whatever is causing the problem is common to both sides. The first thing to check for is air leaks, but it sounds like you have...

Q: My car stalls when hitting a bump, once stalled it takes a while for the engine to restart.

If your vehicle is only stalling when you hit a bump then it will be a loose electrical connection or an electronic part that is sensitive to road shock. This will need to be isolated to locate the issue. The...

Q: Headlights won't stay on

Hi. Usually when this happens it is due to the output of the ballast being unsteady. The new ballast may be defective which is causing your issue, which is somewhat common. Also, the ballast may not be receiving the proper...

Related articles

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...
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...
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...