Setup of an AutoMeter fuel bridge
I did my gas fill and measure the resistance thing today. Here is the resistance map I got for my BG914 fuel pickup / sensor from Year One.
I got lucky coming home the other day and the car ran out of gas as I was putting it in its parking spot. It would not start without some pedal pumping, then it'd die. Knocking lightly on the bottom of the tank makes the fuel float rattle. So I'm sure it was empty. All the way empty. Car won't run empty. My handyman was here and I even took the step of borrowing his digital level and measuring the rocker panel at several points to make sure the car was sitting level. It was 0.5 degree uphill, close enough.
I took my 5 gallon gas cans and got precisely 4 gallons in each, then carefully filled the tank from 0-16 gallons. Here's the numbers I got on my multimeter:
Empty ------------------ 76.6 ohms
1/4 tank / 4 gallons -- 61.5 ohms
1/2 tank / 8 gallons -- 40.4 ohms
3/4 tank / 12 gallons- 20.5 ohms
Full tank / 16 gallons- 7.6 ohms
I have a 0-100 ohm potentiometer coming from Amazon, I'll use that to replicate the resistance numbers to set up the fuel bridge.