I have an 84 GSLSE with original fuel pump. After running the car for about 30 min the fuel pump begins to make a sound like if there were no fuel in the pump and the cars dies. The car won’t start again until is cold. Yesterday I left the car running until the fuel pump started to make the sound and the engine started to missed fire, like running out of fuel. At that time I hosed the fuel pump with cold water. The fuel pump noise stopped and the engine went back to the normal status. Any ideas? Any help will be greatly appreciated.

Thank you,

Luism12lm

 

Can't believe no one replied... Its obvious though, what your problem

 

.......... change the fuel pump


or muffler bearing lol

 

Blinker fluid =D. Ide try that before the muffler bearing.

When parts end up being 27-28 years old they start encountering problems such is the joy of owning a old car.

 

This is the third fuel pump I’ve changed. The previous two fuel pump did the same thing.

 

My theory, junk in the tank, pump works extra hard, overheats, dies.

 

there is a filter in the tank, and a little screen on the pump inlet, since you're gone thru 3 pumps, i'd look at these two things.

 

Thank you guys for the replies. I removed and cleaned the tank before installing the first pump. I also replaced the filter in the tank and the fuel filter. Any others ideas are welcome.

 

Are you replacing the fuel pump with an O.E. part ? They are expensive but I haven't had a problem since I replaced mine with an O.E. part.

 

Are you putting in new or "new to the car'?

Do you have a habit of running near E on the fuel guage? If so you could be creating the problem as the fuel going through acts like a lubricant which in turn keeps the temps down in the pump resulting in longer pump life..... Running on E can cause fuel to slosh away from the pickup causing the pump to run dry .... Would be like running your engine without oil, it will start up and run but for how long ..... That is a legit answer unlike the muffler bearing.

Also confirm you have a good ground as a bad ground will result in issues as well

 

Yes, the parts are brand-new, out of the box OE parts and you’re right, there’re not cheap. That is why is so weird.

 

Not very likely but ask the parts outfit to check with the manufacturer if there is a problem with that number. It's not common but does happen, a manufacturing flaw or even the wrong part in the boxed resulting in premature failure.

If I may ask, what brand is the pump?

 

Did you coat your tank with some type of sealant/protectant? When my pump died and a subsequent one started the whine.... I removed the tank, cleaned the resin/lacquer off the sump filter, cleaned the tank with acetic acid, then coated it with some tank coating product from Eastwood.

Of course now I still have a half-dead fuel pump but several other issues unrelated. Most of my intake system is in the floor of my garage. :-)

jerij

 

I've found that that original wiring providing power to the fuel pump is usually old and going bad. It provides lower voltage than it should. This makes the pump draw more current than it normally would. Higher current equals much more heat in the pump's little electric motor.

I always run my own wiring to the fuel pump and a relay.