Calibrating gas gauge to sending unit 1967

[Steve G.]

Re: Calibrating gas gauge to sending unit 1967

I will probably try the shorting of the wires 1st, and then use an ohm meter connected to the sending unit to check it. I'm hopefully assuming that if the float is pulled to the uppermost height, then it will read 0 ohms and if pushed down as far as it will go then it should read 90 ohms. Is this correct? Also, do I risk the chance of bending the float arm by pushing it down to the bottom of the tank with approx. 1/2 tank of fuel in it ?

I don't think you'd be able to bend it, but 1/2 a tank may make it difficult to push it to the bottom.
Steve

[Stephen L.]

Re: Calibrating gas gauge to sending unit 1967

Try the old "teenager" trick of syphoning fuel out of the tank.... If you are good at it, you can probably empty the tank.......

[Dan B.]

Re: Calibrating gas gauge to sending unit 1967

Wouldn't it be simplest to start with using a coat hanger through the filler and lift the float to the top of it's travel and see what it reads and where the float is when you get that reading. If the float is coming in contact with the top of the tank before it hits the stop on the sending unit you know an adjustment in the float arm is what's required.

Push it to the bottom and see where it is relative to the stop in the empty position. This will tell you where it will be reading on that day you run out of fuel on the way to the service station.

Steve

Exactly what I was thinking, Al did you try that?? Usually, a small downward bend on the arm will fix it. Dan

[Al R.]

Re: Calibrating gas gauge to sending unit 1967

I filled the ol girl's tank up to the bottom of the filler neck Saturday, and the gauge got closer to full, not not all the way there. Then drove it round trip (approx. 150 miles total) to a car show to compete and drive most of the gas out of the tank. Will get it down some more this Sat. coming up on a 40 mile trip. I should be able to check the ohms at empty and use a coat hanger to check the full ohms Sunday morning 1st thing. I forgot I had promised 2 of the grandkids I'd take them to a gun show and college baseball game, so that pre-emptied doing anything on the car. I'm thinking now that maybe the float arm needs to be bent a little to get the gauge to read full, since it went almost to full when filled to the neck. I'm assuming it will take a lot of trial and error to get the arm bent to the right location. Any suggestions on this if this is indeed the case? AS ALWAYS TIA Al

[Wayne M.]

Re: Calibrating gas gauge to sending unit 1967

.........I forgot I had promised 2 of the grandkids I'd take them to a gun show and college baseball game, so that pre-emptied doing anything on the car. I'm thinking now that maybe the float arm needs to be bent a little to get the gauge to read full, since it went almost to full when filled to the neck. ........

Al -- I always love a good pun .

[Al R.]

Re: Calibrating gas gauge to sending unit 1967

Good catch Wayne.