fuel pump or ???

[blackbox]

Well I've been having a problem with my car dying. I was told to check the ign. Module, fuel pump, and crank sensor. A friend let me use some braided line and a fuel pressure gauge. Took the car for a drive yesterday, after about 45 min of driving the car started sputtering then died. I coasted off the road opened the hood and check the fuel pressure gauge which was coiled up. Zero fuel pressure. I then zip tie the gauge on the windshield wiper and sit for about 10 minutes. Car starts up and drives for about ten minutes and I watch the fuel pressure slowly drop to zero and he car sputters and dies. I try to start the car again, turn the key to the on position and nothing. I have all power but the fuel pump won't prime and fuel pressure stays at zero. I wait again for 10 minutes and it primes and starts. Drive for 10 again the same happens. I do this about 4 times until I get to a good location to park it and sit. So I find a place and pull in while the car is dying again. I stop and let it sit for about an hour, turn the key and pump primes fires up. I drive the rest of the way no problem. Does this sound like a bad fuel pump? Seems to not like getting hot. It was about 83 yesterday. Thanks guys just like to be sure before I spend the money on a new pump. Pump is about 3 or 4 years old. What pumps would be recommended for a low 11 second Buick?

 

[williamsGN]

When mine did that it was the pump, tank was low on fuel and I believe it overheated. You could fill it up and see if it works better then you'll know its the pump, but you'll have a full tank to contend with before you can pull the pump. I've been using the Walbro 340s, the first one was one of the 'bad ones' I believe. New one from Racetronix seems to be fine so far.

 

[Dynalow00]

Double and triple check all the wiring for the fuel pump, hotwire kit, and tank connections- sounds like it could be a dirty or loose connection as well. How old is the fuel filter?

 

[blackbox]

My pump is also a 3-4 year old walbro. The filter is due for a change and i will take a look at the wiring this weekend. The tank was on the low side when this happened.

 

[blackbox]

oh when the car was just about to die the whining sound the pump makes would change. Hard to describe the sound that it would make, i guess like a wheezing.

 

[Razor]

Change the pump. You've spent more than 100 bucks worth of grief already.

And do the filter while your there.

A bad connection happens whether its hot or cold. Pumps heat up and then fail.

 

[blackbox]

Thanks for the posts. Im going to drop the tank this weekend in prep for the new pump.

 

[Roc87]

Seems that's the reason why we're seeing knock @ 20psi:frown:

 

[TrAb]

This sounds like what mine is doing. I also let the fuel get to low a while back because my gauge is off a little. Think i probably overheated mine. Just gotta find out which pump is gonna be best for me.