skippermccoy

my wife and i were driving home and the car acted like it ran out of gas so i checked the tank and the gauge i had just under half a tank so then i popped the hood and unscrewed the cap to the schrader valve and pressed it in and for like 3 seconds nothing but air came thru when the fuel came thru it was very very hot.when i bleed it out car fired right up and has been running fine ever since.where do i start looking? car doesnt over heat and runs well

1racerdude

Bad fuel pump or vapor lock.

skippermccoy

i have pressure tested the fuel with my gauge at the valve and it was with in spec the car is stock except for some drive train stuff.how and what do i need to start looking into for vapor lock?

1racerdude

Vapor lock is caused by under hood temp getting to the lines and causing the fuel to boil.Ya have to insulate the lines,but I will put my money on pump and acting up at different times and not the times ya checked it.
If your pump is right it should pump enough volume and pressure to not have this problem.

skippermccoy

thanks for your help and i will get a replacement pump and switch it out couldnt hurt any.

Z28WannaB

Its not uncommon for fuel pumps to go out on these cars at high miles. I have 128K but I haven't had to replace mine yet.

- Z28WannaB

slopokrodrigez

Hey skipper, when you pushed the schrader valve for 3 seconds and nothing but air came out first followed by fuel, was the engine running?

JohnD

Since fuel in these cars is circulated from the fuel rail back to the tank, vapor lock is very, very unlikely. Sounds to me like a bad pump.

skippermccoy

the car was not running ta the time i pushed the valve in but as soon as i got fuel to the valve it started right up

slopokrodrigez

Well that is pretty strange. Think about it, very little residual pressure builds up due to the slight expansion of the plastic fuel lines. Sounds like to me the tank vent may have a problem. Don't do anything further until the problem occurs again. Then if does, pull the white plastic vent off the hose going to the tank. Its located behind the LR wheel and is clipped into a metal bracket. See if it releases a lot of vacuum and then try to start the car again after that.

Also have you looked for any leaks along the fuel lines and especially near the fuel filter.