Skip the auto shop - Our mechanics make house calls

Q: My car will shake/vibrate violently when trying to start or turn off the engine after filling up the gas tank

asked by on

After filling the tank with gas, my car will shake violently whenever I try to start it or turn it off. It eventually will turn on (or off) but the shaking/sputtering/etc. happens every time after I fuel up, until there is less gas in the tank.

My car has 118000 miles.
My car has an automatic transmission.

Hello. This occurs from the purge valve not working properly. It can also be a vent valve issue, but that is not as common. These are part of the EVAP emissions system. If the purge valve is not closed when fueling, it can allow too much fuel vapor to enter the engine which will cause this to occur. I usually smoke test this to see if that is what is faulty. If you want to have this rough idle after fueling problem fixed, a technician from YourMechanic can come to your home or office to diagnose the rough idle and make the necessary repairs.

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!
  • Home
  • Questions
  • My car will shake/vibrate violently when trying to start or turn off the engine after filling up the gas tank

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: How do I adjust the tilt of the steering column?

On the left side of the steering wheel, underneath the multifunction lever, is the steering wheel tilt lever. Pull this lever out with your left hand, and, while the lever is still engaged, tilt the steering wheel with your right...

Q: P0068? Runs rough and idles high

Hey there. This may be a sign of a faulty MAP sensor. The Manifold Absolute Pressure (MAP) sensor is a key sensor because it senses engine load. The sensor generates a signal that is proportional to the amount of vacuum...

Q: Vibration noise when letting off the accelerator

Hello, thank you for writing in. There may be a few different things going on. First and foremost we need to make sure the throttle is not sticking and that the brakes are complete released. If the issue is more...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...