# 2006 Kia Optima - Won't start after refuel **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** kia\ **Created:** [November 1, 2018, 8:30pm UTC](https://community.cartalk.com/t/2006-kia-optima-wont-start-after-refuel/128041 "2018-11-01T20:30:52Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Erin50](https://avatars.discourse-cdn.com/v4/letter/e/46a35a/32.png) [@Erin50](https://community.cartalk.com/u/Erin50)\ **Post date:** [November 1, 2018, 8:30pm UTC](https://community.cartalk.com/t/2006-kia-optima-wont-start-after-refuel/128041/1 "2018-11-01T20:30:52Z")
I have a 6cyl Optima that recently has begun having trouble starting after fueling? Any ideas? ---
**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:** [November 3, 2018, 4:17pm UTC](https://community.cartalk.com/t/2006-kia-optima-wont-start-after-refuel/128041/2 "2018-11-03T16:17:26Z")
Is the Check Engine light on? Tester ---
**Author:** ![Yosemite](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/yosemite/32/643_2.png) [@Yosemite](https://community.cartalk.com/u/Yosemite)\ **Post date:** [November 4, 2018, 12:48am UTC](https://community.cartalk.com/t/2006-kia-optima-wont-start-after-refuel/128041/3 "2018-11-04T00:48:12Z")
Do you have the habit of trying to get every penny of gas in the tank when you full up, or do you stop when the pump shuts off. If you force more fuel into the tank…after the pump shuts off…you can saturate the charcoal canister and it can make for hard starts. It’s one thing to “round” the pump up to the next dime, but forcing another 45 cents worth, is a no no with cars built after the early 1980s Yosemite. ---
**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:** [November 4, 2018, 1:03am UTC](https://community.cartalk.com/t/2006-kia-optima-wont-start-after-refuel/128041/4 "2018-11-04T01:03:14Z")
It’s impossible to pack a gas tank to the point where it saturates the charcoal canister. The EPA knew there were morons out there that would try to do so. So since OBDII was introduced, the EPA demanded a method be devised to prevent that from happening. So the Onboard Refueling Vapor Recovery system has a component called an Overfill Check Valve. ![](https://global.discourse-cdn.com/cartalk/original/2X/a/aec5b5eb7ca8f7e163eab318d0ccc65d6082f747.jpg) This valve not only prevents overfilling of the gas tank, it also acts as a roll-over valve. Tester ---
**Author:** ![Rainflurry](https://avatars.discourse-cdn.com/v4/letter/r/cab0a1/32.png) [@Rainflurry](https://community.cartalk.com/u/Rainflurry)\ **Post date:** [November 4, 2018, 2:31am UTC](https://community.cartalk.com/t/2006-kia-optima-wont-start-after-refuel/128041/5 "2018-11-04T02:31:58Z")
Interesting. Do you have a link or something to confirm that the EPA requires an overfill check valve since the switch to OBD2? That’s not something I was aware of. I can find all kinds of information on overfill prevention valves for underground storage tanks but not for cars. ---
**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:** [November 4, 2018, 2:36am UTC](https://community.cartalk.com/t/2006-kia-optima-wont-start-after-refuel/128041/6 "2018-11-04T02:36:21Z")
> **[Onboard refueling vapor recovery](https://en.wikipedia.org/wiki/Onboard_refueling_vapor_recovery)** > > An Onboard refueling vapor recovery system (ORVR) is a vehicle fuel vapor emission control system that captures volatile organic compounds (VOC, potentially harmful vapors) during refueling.\[page needed\] There are two types of vehicle emission control systems: the ORVR, and the Stage II vapor recovery system. Without either of these two systems, fuel vapors trapped inside gas tanks would be released into the atmosphere, each time refueling of the vehicle occurred. However, an ORVR system William ... Tester ---
**Author:** ![Rainflurry](https://avatars.discourse-cdn.com/v4/letter/r/cab0a1/32.png) [@Rainflurry](https://community.cartalk.com/u/Rainflurry)\ **Post date:** [November 4, 2018, 2:55am UTC](https://community.cartalk.com/t/2006-kia-optima-wont-start-after-refuel/128041/7 "2018-11-04T02:55:00Z")
Thanks. I know the EPA requires a vapor recovery system when refueling but you mentioned that “So since OBDII was introduced, the EPA demanded a method be devised to prevent that (fuel from saturating the canister) from happening”. That Wikipedia article doesn’t show that - it just describes a vent/rollover valve but has a dead link. I was looking for something from the EPA or a more credible source that confirms that it’s impossible to saturate a vapor canister. ---
**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:** [November 4, 2018, 3:02am UTC](https://community.cartalk.com/t/2006-kia-optima-wont-start-after-refuel/128041/8 "2018-11-04T03:02:39Z")
### Vent/Rollover Valve[[8]](https://en.wikipedia.org/wiki/Onboard_refueling_vapor_recovery#cite_note-:2-8)[_[dead link](https://en.wikipedia.org/wiki/Wikipedia:Link_rot)_ ] It provides a method of controlled escape for gasoline vapors during the refueling process. It has a mechanism which closes the vent in the event the vehicle rolls over, to prevent spilling of VOCs or fuel in general. It also acts as a fill limiter. What’s so hard to understand? Now if you want to go to [https://www.epa.gov/](https://www.epa.gov/), and look up the actual regulation, be my guest. Tester ---
**Author:** ![Rainflurry](https://avatars.discourse-cdn.com/v4/letter/r/cab0a1/32.png) [@Rainflurry](https://community.cartalk.com/u/Rainflurry)\ **Post date:** [November 4, 2018, 3:06am UTC](https://community.cartalk.com/t/2006-kia-optima-wont-start-after-refuel/128041/9 "2018-11-04T03:06:39Z")
Easy. Where does that say it prevents fuel from entering the canister? Where does it say the EPA requires this device on all OBD2 vehicles?