# '05 Hyundai Sonata Stalls After Fill Up

**URL:** <https://community.cartalk.com/t/05-hyundai-sonata-stalls-after-fill-up/158794>\
**Category:** Maintenance/Repairs\
**Tags:** hyundai, sonata\
**Created:** [February 18, 2020, 10:27pm UTC](https://community.cartalk.com/t/05-hyundai-sonata-stalls-after-fill-up/158794 "2020-02-18T22:27:06Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![AmberNWilloughby\_163479](https://avatars.discourse-cdn.com/v4/letter/a/cc9497/32.png) [@AmberNWilloughby\_163479](https://community.cartalk.com/u/AmberNWilloughby_163479)\
**Post date:** [February 18, 2020, 10:27pm UTC](https://community.cartalk.com/t/05-hyundai-sonata-stalls-after-fill-up/158794/1 "2020-02-18T22:27:06Z")

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I have a 2005 V6 Hyundai Sonata. Whenever I fill the gas tank to half or above, when I try to start it, it stalls. It never does this if I fill to less than half. To get it to stop I have to press the gas pedal a few times and eventually it will stay running. It usually takes about 3 to 4 attempts each time. Once I’ve got it started the problem doesn’t return until the next fill up. Does anyone know what could be causing this? I’ve talked to a couple different mechanics and they couldn’t tell me anything.

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [February 18, 2020, 10:40pm UTC](https://community.cartalk.com/t/05-hyundai-sonata-stalls-after-fill-up/158794/2 "2020-02-18T22:40:36Z")

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The purge valve in the EVAP system is probably leaking.

When this happens, fuel vapors are forced into the engine as you refuel the vehicle causing a flooded condition where the engine is hard to start and runs rough when it does start.

To verify this, the next time you refuel the vehicle, hold the gas pedal to the floor when you go to start the engine.

If the engine starts right up and runs normally that’s what’s happening.

Tester

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [February 18, 2020, 10:54pm UTC](https://community.cartalk.com/t/05-hyundai-sonata-stalls-after-fill-up/158794/3 "2020-02-18T22:54:42Z")

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> [@Tester](#):
>
> The purge valve in the EVAP system is probably leaking.

+1

And, after the Purge Valve is replaced, the OP should resolve to never again fill the tank after the pump clicks off for the first time.

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**Author:** ![AmberNWilloughby\_163479](https://avatars.discourse-cdn.com/v4/letter/a/cc9497/32.png) [@AmberNWilloughby\_163479](https://community.cartalk.com/u/AmberNWilloughby_163479)\
**Post date:** [February 24, 2020, 1:52am UTC](https://community.cartalk.com/t/05-hyundai-sonata-stalls-after-fill-up/158794/4 "2020-02-24T01:52:25Z")

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Hi, and thank you both for your responses.

@VDCdriver Do you mean topping off? If so, I never do that. I actually never ever realized that was a thing people did before joining this community. Aha

@Tester I’m about to fill up again, so I’ll try what you suggested.