I have tried everything but the fuel assembly.

[SVTC99]

Ok, ive tried replacing the fuel filter, the fuel pump and sock, and i have also removed the silk disk at the bottom of the essembly.
I don't know what else to try other then replacing the assembly, but what could go wrong with fuel pump assembly that would cause my engine to lean out at full throttle when the tank goes bellow half full?!

 

[Ryan]

is the CEL on?

Assuming everything is assembled correctly in the tank, have you check the plugs/wires, etc?

 

[SVTC99]

what is the CEL?

A far as i know everything is connected and put back together properly, b/c it works great during normal driving conditions.