Q: Runs fine for days then acts like running out of gas and then dies and try restart and runs then dies ,when I turn key on you hea

asked by on

I then turn key on and you hear pump in gas tank pump up ,but you donot hear external pump ,you let sit an hour and starts and runs fine and you hear external pump running while engine is running ,replaced both fuel pumps three years ago and fuel pump relay feels hot ? I am thinking external pump is bad.

My car has 300000 miles.
My car has an automatic transmission.

A: The fuel pump in the fuel tank is designed ...

The fuel pump in the fuel tank is designed to have low pressure and high volume to feed the front fuel pump the right amount fuel. The front fuel pump supplies the engine with high pressure to the engine.

When you do not hear the pump run then the fuel pump is bad and should be replaced along with the relay. You should not have to replace the in tank pump if it is running. I'd suggest replacing the fuel filter as well.

I'd suggest getting this inspected by a qualified technician, such as one from YourMechanic, to diagnose your stalling issue and make the necessary repairs.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Unable to shift power steering motor to replace fan belt. Have loosened x 2 adjuster bolts.

Hello. It's been a while since working on one of these, but if my memory serves me, there is either a bolt that is sort of behind and under the pulley, accessible with a box or open-end wrench. The other...

Q: Dashboard is working partially

Hey there. It sounds like it is having serious wiring issues. It is quite possible that one or more wires shorted. This is a potentially dangerous situation, and should be inspected immediately before getting back on the road. If you...

Q: How to set the idle

Hello there, thank you for asking about your 1986 Ford V8-5.0L. The throttle body and idle air control valve should be cleaned first. The idle is not adjustable on this vehicle but the throttle stop on the throttle body can...

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 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.