Skip the auto shop - Our mechanics make house calls

Q: Hard time starting car after refueling

asked by on

Whenever I put new gas in the car, it has a hard time starting. The engine has to stutter for a while before it starts. Also sometimes the engine will rev up and down for a while before it runs normal.

A: Hello. It sounds like you may have a bad ve...

Hello. It sounds like you may have a bad vent or purge valve in the evaporative emissions system. Most of the time this is caused by the purge valve. These valves work to contain the gas fumes in the vehicle until they can be burnt off in the engine at the correct times. If the purge valve is stuck open then these fumes will enter the engine while your are fueling. That will essentially cause the engine to run very rich right after fueling, causing it to run like this. A mechanic would typically remove the valve and check its operation or perform a smoke test.

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: Battery light on while driving, lost power- water pump and power steering still working

You have two serpentine belts: One for the power steering, and the other is for the a/c and alternator. You must have broke the belt to the alternator and a/c. Have the components checked to see what caused the belt...

Q: have a 92 accord that after driving it about 20 minutes it's starts hesitating. I have to floor it to get it to go until the check

Hi there. The most common cause of this is the distributor itself. The distributor starts to fail which causes the internal sensor to not read correctly and it will also cause the coil to overheat in some cases. The Check...

Q: Gas Hog

Hi there. There are several things that can cause excessive gas mileage including dirty fuel injectors, mass air flow sensors, or O2 sensors. Since you're getting ready to leave for college, I would recommend having a professional mobile mechanic come...

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.