Skip the auto shop - Our mechanics make house calls

Q: The car has trouble starting after gas tank is filled up

asked by on

My car has around 110,000 miles on it. When I fill the gas tank up, the car has trouble starting. It happened several times already. I would then try for a while until I start it up again. After that, the car would run fine until I fill the gas tank up the following time. I went to a shop for this but they couldn't fix it. Do you have any idea why this happens? Thank you.

A: When you fill your gas tank, a lot of fumes...

When you fill your gas tank, a lot of fumes build up in the fuel tank and usually excess fumes come out of the fuel filled tube and out to atmosphere or into a recovery system in the fuel pump handle.

You may have a purge valve that is not sealing correctly and the fumes are going into your engine causing your engine to be flooded with fumes while you are refueling. You can help your car start by holding the throttle wide open to get extra air into the engine to get it started, and then letting off the gas once it starts. This is only a way to get it started after refueling until you get the purge valve replaced to fix the problem. If the problem persists, have a mechanic, such as one from YourMechanic, diagnose your car’s hard starting problem to verify what needs to be done.

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: The transmission hot idle engine sensor has come on, what is the problem?

That is a warning light to tell you that your transmission is running to hot. This could be due to driving the car very hard or driving in very hot weather. The vehicle is asking you to stop and let...

Q: Can bad intake manifold blow a head gasket? 2010 Toyota Prius

Hello - it is unlikely a bad intake manifold gasket will cause a blown head gasket on a Prius (different story for GM V6 engines). It is possible that a failing head gasket can cause a misfire over time -...

Q: Why isn't my truck not starting?

You have an electrical issue at the fuel tank. It is possible a wire was pinched/broken on the fuel pump assembly. Also possible is the fuel pump harness was damaged or pinched when your fuel tank was removed and replaced....

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...
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...