[SirFency]

I have a very bizzar issue. My car seems to start hard after sitting in the hot sun. When I start the car up when its cool outside it fires right up. After driving the car and the engine heats up to running temp I can shut it off and it seems to fire up just fine after a couple minutes but it seems like sitting in the sun makes it start hard. I'm really scratching my head on this one. Somtimes after driving for a while and letting it sit for around ten minuets or so it starts hard as well. I did some research and saw alot about vapor lock however I have a fuel injection system and I guesse its rare to happen on this system. What are some of the things that I should check? I thought it could be the air intake sensor but I dont get a check engine light. I just did a compleate tune up including Plugs, wires, fuel filter, injectors cleaned, oil change (synthetic) and and air filter. Thanks for any suggestions you may have.