I own an '89 IROC Z28 with a 5.7 TPI. After about an hour of driving the
car, the fuel pump will start to whine and actually cause the car to
stall. If you pull the cap off of the gas tank, you can actually see white
smoke coming out from inside of the tank! I have replaced the pump, the
regulator, filter and have blown the lines through with air pressure. The
engine stumbles as if it is "running out of gas" when the whining starts.
If anyone has any ideas or suggestions, PLEASE let me know!!!