My car just dies when it warms up when it cools off it fires back up and runs fine

SOURCE: 2001 hyundai sonata running rough

Try cleaning the IAC idle control valve. Buy a can of brake cleaner or carburater cleaner and with the car running at 1200 rpms spray right into the fuel system area where you take off the duct work for the air cleaner.The idle control valve can be removed also and the 2 holes on the under side of the valve cleaned. They get dirty and cause rough idling or no idling.

If not, have your car scanned for a code to check if it is the IPS (idle position sensor.)

For the gas filling problem , do not stick the whole nozzle in. Just enough to where you can pour the gas without the nozzle clicking off.

SOURCE: 03 tiburon cranks,but wont idle or run

does your alarm system go off, and result in it not starting???

SOURCE: Nology hot wires and Nology silver spark plugs

its because ur using a non resistor plugs they interfere with the other electronics of the car modern cars need resistored plugs

SOURCE: Code p1166 only months after New Plugs, wires, Air Filter, & OLF?

Change the air flow meter on the air intake pipe.

SOURCE: My 2002 Hyundai Elantra Gt (2.0L)engine runs rough

The Hyundai online shop manual and my newly arrived Hyundai shop manual kept pointing to the coil as a possible problem. While preparing to check coil continuity I discovered the pigtail connected to the bottom of one of the coils was loose and the contacts were burned. This is the coil that supplies spark to plugs 1 & 4, the same ones that kept showing up each time the check engine light illuminated. After cleaning the contacts and making sure the pigtail was securely attached to the base of the coil I have had no further problems.