I'm having a similar issue, but I only have the one key. The housing was cracked and falling apart, so I changed it with a new shell from ebay. There was an led attached to the board inside the key and that broke off. Could that be my issue? Everything else works(buttons, flip key, etc) the engine turns over but won't start. I replaced a coil pack and the FPR, but still won't start. If I put gas in the intake it fires until that gas is gone.

Broken Key? If so that sucks, how much are they?