Gas gauge

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03-05-2005, 12:44 PM
Doughnut

Gas gauge

I have a 1957 2 DrHt. 400 cid motor. Turbo 350 trans. The gas gauge goes to full when I fill it up. Instead of metering the fuel level it will just drop to empty when the amount of gas in the tanks drops. There is no in between. Either reads full or empty

Please help!
Ralph
03-05-2005, 12:51 PM
Oldf100fordman

Sounds like your intank sending unit is bad. It's not messuring the ohms of resistance except at full.
03-05-2005, 01:20 PM
Doughnut

Would that be the tank sending unit or at the dash sending unit?

Ralph
03-05-2005, 01:22 PM
Oldf100fordman

The tank sending unit. It creates a resistance measurement that then is read by the dash gauge. If it gets worn it won't make contact and give the resistance.
03-05-2005, 01:59 PM
lt1s10

Re: Gas gauge

Quote:

Originally posted by Doughnut
I have a 1957 2 DrHt. 400 cid motor. Turbo 350 trans. The gas gauge goes to full when I fill it up. Instead of metering the fuel level it will just drop to empty when the amount of gas in the tanks drops. There is no in between. Either reads full or empty

Please help!
Ralph

its not but one way to find out for sure. take the fuel gauge wire off of the sending unit at the tank and ground it out, if the dash unite goes to full and then take it off of ground and the dash unite goes to empty then its the tank sending unit bad. by it going to full the way it does pretty much tells you its the tank unite anyway like Oldf100fordman said.. :cool:
03-05-2005, 05:49 PM
Doughnut

It's the sending unit! I first grounded the unit went to full. I took the ground off and it went to empty. Thanks you guys I really appreciate it!!

Ralph
;)