AWS and Routing with Fortigate

Greetings.. So I am having an issue and maybe someone here can help..  So I have 3 VPC's setup.  1 has 2 subnets public/private.  FortiGate sits here.  I then I have 2 other VPC's with peering, default routing to FG VPC, and no ACL/Security is wide open.  Any thoughts why I couldnt connect to the outside world from a EC2 in a remote VPC peered to the FG VPC.  The connection goes as such.  (VPC A) EC2 -> Peering Connection -> (VPC B) Inside FG   I can ping from the EC2 to the inside interface across the peering connection with success.  However routing to the outside world doesnt happen.