Q: Is it a fuel pump issue?

asked by on

My truck will stall when the rpm goes below 700. No check engine light comes on. Temperature is fine. Oil and gas are fine. I cannot strt the engine again without doing this method: press down on the gas pedal, take foot off gas pedal, and then press down halfway on gas pedal while turning key. I don't hear any strange sounds. No smells.

My car has 169000 miles.
My car has an automatic transmission.

It’s possible that a failing fuel pump, or a clogged fuel filter or fuel injectors for that matter, can cause stalling at idle but there are other common causes such as vacuum leaks, EGR system faults, sensor faults such as the mass airflow sensor, as well as problems with the throttle position sensor and idle air control valve. Although the check engine light is not on, a Mechanic would still look for stored or "pending" codes to aid the diagnosis. A certified professional from YourMechanic would simply test each of these systems methodically, in turn, until the fault is found. It should be pretty easy in your case because you are not describing an intermittent problem, that is the fault is always there below 700 RPM and thus one of these systems is going to report "out of range" once tested per FSM (Factory Service Manual) specifications.

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. Q: Is it a fuel pump issue?

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: Truck overheats because coolant is pushed Into overflow tank until cooling system is empty and will not re-enter the motor.

Overheating, which can be due to may causes of which a leaking head gasket is just one, will potentially cause coolant loss through the radiator cap as the radiator opens as a pressure relief device. Exhaust leaking into the coolant,...

Q: My van won't start sometimes then will start like 2 min after. Battery and alternator both good

There may be a variety of potential reasons for this to happen. First, if the van cranks over we can rule out the starter, battery and starter relay. If it does not crank over and simply makes a "clicking" sound,...

Q: After driving the car for 10-15 miles , if I stop the engine and try to start it will CRANK but wont start

Next time this happens, push the gas pedal all the way to the floor. This puts the car into what is called clear flood mode. This means the Powertrain Control Module (PCM) will not supply injector pulse to the injectors,...

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...
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...