Q: Car starts then sputters off

asked by on

My impala lights turn on when key is turned , car starts but sputters off after a few seconds like I'm out of gas . The day prior I noticed that when on the highway I pressed the gas to go faster and the engine reved a few seconds late . Someone told me spark plugs, someone said fuel pump and or the relay , also someone said the fuel filter but now I heard it's inside the tank. Please help me!!!!

My car has 120000 miles.
My car has an automatic transmission.

This may likely be a fuel supply issue such as low fuel pressure or a faulty throttle position sensor. The throttle position sensor is a unit used to monitor the throttle position of a vehicle. This sensor relays the position of the throttle plate relative to your foot’s position on the gas pedal. The ECU then makes the direction to supply more or less fuel to the motor. When this sensor is not working properly, this can cause intermittent responses when pressing the gas pedal. To avoid any unnecessary repairs, I would suggest having a professional from YourMechanic come to your home to diagnose this sputtering issue and replace this sensor if needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Car starts then sputters off

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: Vehicle fails dead at signal light or stop sign

It is possible that the throttle body gasket or intake manifold gaskets are leaking vacuum. The engine produces vacuum to draw in air and fuel. This vacuum needs to be regulated by the induction system. Some vacuum leaks can be...

Q: When rev engine, short lag and slows to idle

You did not mention the engine you have in your truck, but I would suspect the engine turbo vane control is sticking when you rev the engine and will cause the engine to stay revved until the vanes go back...

Q: Where do I insert antifreeze coolant

Hello there, thank you for asking about your 2006 Chevrolet Impala. You will put coolant into the engine expansion tank on the fender. Make sure to only fill to the full hot line when the engine is warm. If you...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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 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...