flynylon
New Member
So here's the deal: PO reported that the PO before him said he hadn't used the main fuel tank in my 71. I tracked down and called 2nd PO and asked him why he said that. He said that "the switch or something wasn't working," so he just went to using the AUX tank.
The main tank is darn near empty, and when I hooked up a vacuum pump to the line at the mechanical tank switch, I could draw out a little funky gas. I could hear a sucking sound inside the tank, so it seems that the lines are decent. I haven't found any sort of leak indication, and the tank looks pretty darn good for being almost 39.
I flipped the dash switch to MAIN with the ignition on, and the gauge ran up to FULL. I went underneath, disconnected the connector, and ran voltage on it. It was at .20 volts, and the gauge still read FULL. I found about 120 ohms of resistance between the leads on the sending unit (tank is empty). I also found a compromised wire near the tank, but it hadn't run to ground.
So, as a relative dilettante in automotive electronics, what do you think I have? A sensor wire that's grounded further up the line and/or a bad sending unit?
Thanks in advance!
mike
The main tank is darn near empty, and when I hooked up a vacuum pump to the line at the mechanical tank switch, I could draw out a little funky gas. I could hear a sucking sound inside the tank, so it seems that the lines are decent. I haven't found any sort of leak indication, and the tank looks pretty darn good for being almost 39.
I flipped the dash switch to MAIN with the ignition on, and the gauge ran up to FULL. I went underneath, disconnected the connector, and ran voltage on it. It was at .20 volts, and the gauge still read FULL. I found about 120 ohms of resistance between the leads on the sending unit (tank is empty). I also found a compromised wire near the tank, but it hadn't run to ground.
So, as a relative dilettante in automotive electronics, what do you think I have? A sensor wire that's grounded further up the line and/or a bad sending unit?
Thanks in advance!
mike