GN left me stranded today

[coldair85GN]

Now its sounding like the pump went out

 

[chris]

8.03 volts at the connector for the fuel pump.

You need to get 12 volts at this connection before I would drop the tank.

 

[krkrzyrflbch]

Where did you buy the Walbro?
there were some problems with Chinese fakes (Walbros) being sold.
8.03 VDC at the pump is not sufficent; it will run but kill the pump very quickly.

Got it from G-body parts.

Guess that voltage may have killed the pump. That's just with the switch turned on, it may read different if the alternator is turning and feeding current through the hotwire. Otherwise I'm not sure why the voltage is so low.

 

[krkrzyrflbch]

I just checked voltage the same way I checked mine (ignition on car uncranked) at the hotwire on another Turbo Buick with the same setup (hotwire, walbro 340) shows 12.83 volts at the battery and 8.64 volts at the hotwire connector.

I hooked up a charger to my car and have 13.00 battery volts and 8.72 volts at the hotwire connector. This is essentially the same as the other car. Are you sure there is supposed to be 12 volts at the hotwire connector? My understanding is that the hotwire is supposed to improve voltage over the factory wiring and add a safety net via alternator backup should you lose battery voltage Before the hotwire installation, there was about 6.5 volts at the pump. At almost 9 volts I would say that is much improved.

 

[bison]

The voltage should be the same at the connector as the alternator post.

 

[krkrzyrflbch]

Got the tank out and removed the pump. I tested the voltage at the pump and it doesn't read anything on the voltmeter, but I did plug the old pump back in and it primed every time I turned the ignition on, so it must be the pump that failed. Just waiting on a replacement 340 in the mail before I put it back together.

 

[bison]

Got the tank out and removed the pump. I tested the voltage at the pump and it doesn't read anything on the voltmeter, but I did plug the old pump back in and it primed every time I turned the ignition on, so it must be the pump that failed. Just waiting on a replacement 340 in the mail before I put it back together.

It will only have voltage with the key on not running for a few seconds unless you go send voltage to the test lead. Id go from the connector at the pump to ground to verify you have battery voltage there.

 

[krkrzyrflbch]

I've got voltage there because the old pump works. The Walbro does nothing.

 

[wordy1]

Check the wiring inside the tank, and make sure everything is connected properly and that the float is able to move properly. Not sure what caused the pump to fail, but these are normally pretty darned good and last a long time.. Maybe you can get a refund... GOOD LUCK< let us know how things go.

 

[bison]

If you hold the walbro in your hand and apply the 12v and ground can you get a voltage reading off the ground? If not he windings are fried in the pump. Not very common though. If yes maybe a piece of debris is jamming the pump. Inspect the fuel sock for a cut or some way for a piece of debris to get through it.