Q: Car won't start after getting gas

asked by on October 08, 2016

When getting gas and going to start my car it's not starting up. I have to put pressure on the brake for a few seconds and then my car will start right up. I have to sometimes hurry and put it in drive so it won't go down as well.

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

Fuel Pump Replacement $145.32 - $1299.70 Get a Quote
Crankshaft Position Sensor Replacement $120.83 - $900.50 Get a Quote
Car is not starting Inspection $94.99 - $114.99 Get a Quote

Hello. If this is occurring right after you get fuel then most of the time it is caused by a vent valve or purge valve that is sticking open. Most of the time it is a purge valve problem. This valve is part of the evaporative emissions system and needs to be closed most of the time, especially when fueling. If it is open it will allow fuel vapor and even at times raw fuel to enter the engine while fueling. This essentially causes a rich condition or floods the engine and that is why it takes time to start it back up. It can also be a failing fuel pump or coincidentally a failing crankshaft position sensor. These are all common, but I always check with the evap system parts first. If you need to have this hard starting problem figured out, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Replaced spark plugs and battery, and car won't start.
This to me sounds like either an issue with the fuel or ignition system. If the battery was replaced and jumping doesn't help the battery is good. The spark plugs being replaced makes the ignition system is less likely than...
Won't start right away. Chugs while excellerating .
Your 1995 Buick LeSabre has two different problems: The hard start problem is the fuel pressure not being maintained after shut down. This can be caused by the fuel pump (https://www.yourmechanic.com/services/fuel-pump-replacement) in the tank or the pressure regulator (https://www.yourmechanic.com/services/fuel-pressure-regulator-replacement) on...
changing timing belt on 10 year old car with 52k miles, not required till 102 k but decade old belt= bad?
My suggestion would be to take a close look at the belt for microscopic cracks or signs of deterioration. If anything is noted, I would spend the money and replace it as this is a relatively cheap "insurance policy" against...
Issue with AC after timing chain replacement?
My vote is for coincidence. The temperature blend door actuators are a pretty common failure item on these models as well as timing chain concerns. The temperature blend door actuator is mounted inside the dashboard while the timing chain replacement...
Car hesitation from stop to acceleration
Hi, thanks for writing in. Prior to further diagnostics you should install the spark plugs that are referred to in the factory service manual and/or obtain the plugs from a GM dealer. Installing alternative aftermarket plugs with different gaps, materials,...
Brake lights stay on 2000 Chevrolet Silverado 1500
Hi there - I believe your brake light switch (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-brake-light-switch) is either sticking or mis-adjusted, resulting in the brake lights remaining on after the brakes are used. Turning the ignition switch to the "Off" position removes power to that circuit,...
If the AWD stays on what service is needed.
It sounds as if the light was not on when you brought it to the dealer. If this is the case, and there isn't a code in the AWD module, then there is nothing anyone can do with a car...
What causes the battery and fuel icons to appear on the istrument panel resulting to stopping the car's engine? 2000 Honda Civic
Hi - the fuel pump icon comes on when your Civic is very low on fuel - basically less than a gallon. The "battery" light (https://www.yourmechanic.com/question/battery-light-turned-on-while-i-was-driving-by-tiffany-r) comes on when the alternator is not charging, which could cause system voltage to...
car will not start
If you are sure that fuel is not flowing through the fuel filter that means that the fuel pump is not powered or is not functioning. When you turn the key to the "on" position, you should hear the in...

Related articles

Which Type (Octane) of Gas Is Recommended for My Car?
When When someone pulls up to a gas station, the first thing they’ll see is the big sign lit up with the prices for the different grades of gasoline. There’s regular, premium, super, and a number of other variations of...
How to Improve Your Gas Mileage
Every driver wants a fuel efficient car. Check your tire pressure, replace old spark plugs, and change your engine air filter to improve your MPG.
How to Replace an Evaporator Temperature Sensor (Switch)
The air conditioning system has an evaporator temperature sensor that fails when there is no cold air or the air conditioning is inconsistent.