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If air valve in cap is blocked, then no air can enter the tank as fuel is used. This causes a vacuum and stops fuel from pumping. Remove cap when motor is warm tank is only half full and drive for about 5Klm. If it doesn't stall then replace your fuel cap with a new one. If it still stalls then something else is the problem.

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Q: Why would car stall with gas cap on?
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Related questions

Will a loose gas cap cause your car to stall?

no but in most late models your check engine light come on


Why would a car stall while getting gas?

A modern car's gas tank is designed to have pressure in it. If it does not have pressure, the car could stall. That is one way to keep gasoline from evaporating into the atmosphere.


What would cause a car to stall without any notice?

water in gas tank


Car runs fine and no problem starting except when i buy gas. After i funish pumping gas car stalls out a few times when i turn the key. after about 3 tries it goes?

I had this problem whenevery the gas cap was loosely fit back and my car would be sluggish or stall. I was told to firmly cap the gas each time because the pressure could otherwise release. perhaps pressure is released after you buy gas and needs to pressurize to run properly.


Why would a car stall when parking in a parking spot?

The most common reason for a car to stall is a lack of fuel. The gas tank could be empty or the fuel injectors. Need to be cleaned.


Can gas freezing cause car to stall?

gas can't freeze


Will bad gas make your car smoke and stall?

It can.


What would cause a car to suddenly stall while on the freeway?

Running out of gas, timing chain breaks.


Would an old fuel filter cause your car to stall out then start but die again when you put on the gas?

yes


What is the gas cap on a car?

The gas cap can prevent vandals from siphoning out (stealing) your gas if you have the type with a lock.


Why would your 95 contour stall every time your foot is not on the gas?

My car has done the same thing and i found that old gas was the only problem


What are the possible problems that would result in my car smelling like gas on the outside besides a loose gas cap?

Small gas leak