Engine temp, fans, etc.

[Pantera]

Sounds like a vent hole on the gas tank cap may be closed up. Try leaving it loose and put a shop rag between the deck lid and the actual gas cap to keep it from coming off completely. Then drive it easy for a while and see if that makes any difference.

Be sure to blow out the overflow drain line from the gas tank rubber boot that goes down to the ground just in cast any may slosh out. Unless your tank is totally full you will not even loose any as long as you don't do a hard launch.

This will point you in the right direction.

Also check out the fuel pump to see if the fuel lines or the pump it self, is too close to tube headers (if you have them).

It sounds like you are boiling your fuel. Now all you have to do is figgure out how?

Good luck.

Pantera