every once in a while when i put a lot of gas in the car, it has a hard time starting. it tries cranking for a while, and after about 5 seconds i start pumping the gas pedal and it starts up. any idea what is causing this? it doesn't happen all the time, happens more often when i put a lot of gas in there

 

Are you overfilling the tank(filling after the pump shuts off)? If soyou may have saturated your charcoal canister. Otherwise id guess that your evap purge valve on the airbox is sticking open causing gas fumes toenter the intake during fueling. Try pinching off the line the next few times you fill up. If the hard starting goes away you have your culprit.