mazda5 hard start after fill up
 

i have an 06 mazda 5 that is hard to start after fill up. it also throws a code (p2187 lean at idle). half tank is gone and the check engine light comes on drive it is lean at idle. it stalls sometimes at stoplights. get to the fuel station and fill it up. try to start and it take s5 or 6 cranks and foot on the gas it will start, also the check engine light goes off. after that it runs good for a while then it throws the code again. anybody have any ideas? thanks