2001 Hyundai Sonata

When I get gas the car will not start normally. This only happens when I get gas. The car starts and rides fine all other times. After getting gas the car will attempt to start then turn off. To get it to stay on I will have to turn it on quickly give it gas (rev the engine) put it in drive and get it moving. Ones I do this the car stays on and the problem will not return until I get gas again.

Problem happens when I usually fill up from 1/4 tank. The problem also accured at filling to 3/4 tank from 1/2 tank (to test) however After filling with 2 gallons from 3/4 tank the car started fine. Just thought that was worth mentioning.

I quickly researched the problem on the web and Some one posted the exact same problem for a 2003 Hyundai Sonata.

Tech recommended replacing the Purge Control Valve. I had my mechanic clean it out for me but that did not solve the problem. A car savvy friend of mine thinks it may be sediment in the gas tank that could be causing the problem in which the filter needs replacing/cleaning and the gas tank needs cleaning as well. The first solution I would have never have guessed the second makes more sense.

Please, what are your thoughts?

Your help is very much Appreciated.

Thank you,
Victor

The answer from the other websites tech is below.



"The purge control valve is a computer controlled solenoid valve which allows fuel vapors into the engine to be burned off while you're driving. Normally, the valve is closed. There are two wires going to the valve, one with switched ignition power, and the other from the computer which grounds the solenoid valve to cause it to open. For the purge control valve to cause the problem you're having, it would need to be stuck open.

You'll find the purge control valve in a vacuum line behind the intake manifold. It'll be black, about the diameter of a quarter, and about an inch and a half long, with a nipple on either end for a hose to attach. I believe it'll be in a round rubber holder attached to a metal bracket. Take the hoses and electrical connector off the valve and take the valve off the engine. Try to blow through the valve. If you can, the valve is stuck open and is causing your problem.

If this problem doesn't happen every time you fill the tank, you need to consider just replacing the purge control valve anyway. It's possible that it'll be operating normally when you test it. Considering the possibilities, if it only happens when you fuel the vehicle, it cannot be anything other than the purge valve.

The only two ways for fuel or fuel vapor to enter the engine are through the injectors or the purge valve. If it were entering through the injectors, your problem would happen every time you shut the car off, not just when refueling. By process of elimination, that leaves the purge control valve."