why does smoke poor out of the exaust when i reach top speed

[tj but]

my kfx poors smoke out the exaust when i run it at top speed for a while. its white looking smoke. also the engine has the tendancy to die when i come to complete stop. I have a 440 je piston in my kfx and stage 1 hot cams please help iam cofused on what it could be

[BlueZ440]

I not a 100% sure but it might be your head gasket..that will cause the white smoke.. i had the same problem when I put my 440 kit on..it wouldn't stay on..change your jetting and your pilot jet that should be all..