Hello all, what is the ohms specs for my 68 f100 with stock tank sending unit. Auto meter was 3 to choose from,
1: 0 ohms empty 90 ohms full
2: 72empty 10 full
3: 240 empty 30 full

 

Stock sender? Please read Fuel Tank Sending Unit Tech - FORDification.com

... got to the bottom of the page because there appears to be issues between OEM and aftermarket senders.

 

If you have a stock sending unit, 70-10 is the one you want. I just installed one in my truck last week. It's working at this time but not very accurate. There seems to be a lot of movement on the needle. I did not connect the voltage regulator initially but I think I will go back and try it to see if makes any difference. The stock gauge was working ok so I think the sending unit is ok. I would be curious if you see the same behavior after installing yours.

 

Read the article I posted and ya might understand why it isn't accurate.

 

Thank you great article! I'm ordering the 240 Ohm Empty / 33 Ohm full gauge and sending unit.

 

You're welcome. Glad to help.