demonpixel

iTrader: (19)

93 Camaro w/LS1 swap here, drove the car perfectly fine today and fuel gauge was working properly. When the gauge was at a quarter full (meaning a quarter above half full, pointing northeast), my gauge needle wobbled before shooting all the way up beyond Full. I was just driving normally, cruising along at about 50mph, nothing crazy.

It did not affect the car's drivability in any way.

I did this test on the purple and black wires:



and my multimeter reading didn't read ANYTHING. I double checked to make sure my multimeter was working properly with a few Radio Shack resistors I had, and the multimeter is working just fine.

Is this an indication that my fuel pump sending unit has gone out? The sending unit is from 1993, so it's fairly old.

Thanks in advance for any help/advice.

myk

iTrader: (4)

No power at all, huh. Did you turn the key to the "ON" position (not RUN) when you set the meter on it? I wonder if the gauge could be having issues too...

Lonnies Performance

iTrader: (16)

You could have a bad connection in the tank, but more than likely you have a bad sending unit. When the sender goes bad it loses connection & will show an open circuit like you are seeing (causing the gauge to go past full). This can be a random problem at various fuel levels, or it may quit all together.

demonpixel

iTrader: (19)

Yep, I turned the key to ON also, and tested. Same thing. No reading. I wondered if it might be the gauge also, but taking that assembly in and out so many times, I wouldn't be surprised if it was damaged. There is a way to verify that the gauge is working and I should probably do that and report back, thanks for reminding me.

Ah ok, thanks Lonnie. Would you happen to know what the main cause of sending units going out is? Is it age? Or damage due to mishandling a fragile part?