Skip the auto shop - Our mechanics make house calls

Q: Fuel pump

asked by on

My car stalls at a half a tank it spits and sputters toys that turns over later and you work but it won't start it's just a fuel pump or something else

My car has 150000 miles.
My car has an automatic transmission.

Make sure the fuel gauge is actually accurate. Maybe "half a tank" is "empty"? It is relatively easy to rule out the fuel pump by testing the pressure on the fuel rail but that will not tell you anything about whether the injectors are actually delivering fuel. However, if the truck "sometimes" runs smoothly, it is probably not the injectors but rather a fuel delivery (pump, pressure regulator) issue, an ignition fault, or an issue with malfunctions in the air induction system, such as the throttle position sensor, mass air flow sensor, idle air control and so forth. To get this diagnosed and resolved, the recommended service is an engine stalling diagnostic. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Codes p0101, p0131, p0137, p0151 & p0327 I guess I'm asking would replacing the ECM solve the problem? 2002 Chevrolet Blazer

Hello - the codes you list (besides the P0101 for the MAF) reference problems with the oxygen sensors and a knock sensor (P0327) for your engine. These are normal higher mileage maintenance items, and do NOT require replacing the ECU....

Q: Truck will crank but will not start

The best way to approach a starting issue like this is to break it down and start with one system at a time. Keep it as simple as possible. If you have not already checked for spark, you will want...

Q: Hi is it possible to confuse a faulty fuel pump with a faulty throttle body on a VW Tiguan (Australian model)?

Hi there. To see if the fuel pump is working properly, install a fuel pressure gauge on the fuel rail with the fuel system in a closed loop and have the gauge visible to the driver with the hood shut....

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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.