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Old 06-11-2008, 07:42 PM   #1 (permalink)
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Recently, my 2004 Sonata has been hard to start after getting gas. I am not filling the tank when I go to the gas station. Put in about 6 gallons last time I went. I verify that the cap is being put on correctly. When I try to start, it runs very rough and then stalls. Eventually I get it started. It will start fine everytime after that until I go to the gas station again and put a few gallons in the tank.
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Old 06-23-2008, 03:35 PM   #2 (permalink)
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Dear mgg,

Read the other posts on this issue. The 2004 Sonata evidently has a problem with rust in the purge valve that connects to the intake manifold. The valve get some rust particles in the assembly, and gets blocked open.

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Old 11-24-2009, 02:44 PM   #3 (permalink)
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QUOTE (byronguidry3732 @ Jun 23 2008, 03:35 PM)
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Dear mgg,

Read the other posts on this issue. The 2004 Sonata evidently has a problem with rust in the purge valve that connects to the intake manifold. The valve get some rust particles in the assembly, and gets blocked open.

Byron
Hi; I just joined the forum because I was having the same problem.

Just in the past 2-3 months, whenever I gas up at the pump, the engine won't start unless I press the gas pedal. Then it races until I release gas pedal, then it stumbles, and will stall if I don't give it gas again. It does this for about the first 1-2 minutes while it "heals" itself, then I can leave the station and it runs perfectly normal until about a week later when I gas up again. Sort of embarassing but I'm more worried about long term effects.

Thanks for the tip, Byron. It's good to have a reference point. I'll search the forum on "purge valve".

Mark
2004 Sonata 56K mi

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Old 01-14-2012, 12:23 AM   #4 (permalink)
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I have the same problem I need answers pleaseeee wat can I do wats da problem!?
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Old 01-14-2012, 01:34 PM   #5 (permalink)
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I have the same issue with my 2003 Sonata and i have been told the same thing by a mechanic at the firestone that most of the hyundai models (upto 2005) have this issue.

I am gonna ask my mechanic to change the purge control valve and see if it makes the problem go away.
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Old 01-14-2012, 03:19 PM   #6 (permalink)
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http://www.hyundai-forums.com/194-y2...ing-after.html

Kinda like 1 of the oldest problems in the book.
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