Just bought used 2009 Hyundai Sonata. When I try to put gas in, the filler nozzle/handle clicks off after just about ever gallon or so instead of just filling till full and clicking off then. So I have to keep manually filling and eventually I get about 8 gallons in and give up and I am up to about 1/2 a tank on gauge. Gauge seems accurate as first time I put gas in the low on fuel light was also on and I got about 8 gallons in and I was at about 1/2 tank in a 17.7 gallon tank. What is going on here? What fixes this?
You may want to try pulling up to the pump from the other direction.
I’ve had vehicles that the nose of the car/truck must be slightly down hill also.
Most of the station lots have a slight slope to shed rain water better.
The other possibility is that the evap system which takes in the fumes while you fill up,and stores them until the engine is running…may not be operating properly.
Is the check engine light on???
Yosemite
Try filling it on slow, it might be an expensive repair to chase down,
There’s a restriction in the Onboard Refueling Vapor Recovery system.
Have someone check this system for spiders laying egg sacs in this system, which doesn’t allow the fuel tank to vent when refueling.
Tester
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+1 to Tester’s comment.
For reasons that are unclear to me, Hyundais of that vintage seem to have a problem resulting from spiders contaminating the vapor recovery system.
Thank you Yosemite. Yes, I first refueled, after buying the car, about a week ago. Then 2 days ago, on my first drive of any length since, the check engine light came on.
Post the codes and that will help get decent answers. Also if this purchase was from a used vehicle sales lot check your state regulations to see if they have to provide some kind of warranty or a buy back program.
Thanks Tester. Check engine light was/is on. The mechanic first blew out the evap control valve and then I drove it couple weeks and the check engine light came back on and stayed on. I brought it back to mechanic who then replaced the evap control valve with a new one and charged me $100. The check engine light was not on till I drove it several days later when the check engine light then came back on. In fueling, the pump still clicks off a few dozen times in the process of putting in 10 gallons. Every time, I have to wait about 10 seconds to start fueling again or else it clicks off immediately. Any further help/instructions?
all 09 sonatas do this eventually. they all burn thru brakes like crazy. they all get transmission low speed hickups… and they def ALL have evap system failures. i’ve been thru 4 of them… including 2 on same vehicle after a total evap system replacement the first time. its an expensive fix no matter what… unless maybe a smoke test can determine specific parts at fault. i havent seen that succeed yet though. anyway thats what causes the fueling up issues, stoppages. you just need to refuel VERY slowly. sometimes it helps to not push the gas pump nozzle in as deeply. at certain gas station chains the fillup is not quite so terrible, but mostly its an annoyance to get used to.
I found a YouTube video showing how to handle the refueling issue. There is a visible larger-than-a cigar-shaped tube connected to the evap system. It is close to the filler neck and under the car and connected by rubber tubes. It is full of activated charcoal that gets plugged up over time. The solution is to replace it or ream or drill out the old one so air can pass through it and put it back on.
Your idea is appreciated, but I wouldn’t advise that method myself. The Hyundai engineers placed that part there for a reason, and attempting to re-engineer the car’s evap system may bring on unwanted & unintended consequences. Much more likely to work for the long term and not introduce further problems is to replace any failing evap system part with an oem replacement.
The evap system is critical to reduce air pollution, but otherwise doesn’t provide any overly complex functions; but unfortunately there are many, many evap system failure modes. You can search the forum for examples if you like, search link upper right this page.
If a diy’er cannot see anything obviously wrong , like a split hose, a spider-caused blockage in the part mentioned above, etc, the best bet is probably a shop with a Hyundai pro-level scan tool and a smoke machine. They can open & close the various valves and watch where the smoke goes. Let them do the diagnosis, then if you want to do the repair yourself, you always have that option.
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Drilling a hole overrides the pollution abatement system and this doesn’t necessarily fix the problem if the purge solenoid is bad. It is also possible that the purge and vent valves aren’t getting a signal from the PCM. If you can’t test all that you should have a shop do it.
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