Fuel Sending Unit

John McMahon · #1 (**permalink**) 02-23-2002, 01:37 PM

Bob,

I just checked the ohm ratings on my fuel guage (S/W large face FIAs) and my fuel cell.

The fuel guage reads 75 ohms and the fuel cell sending unit reads 250 ohms.

Any recommendations on what sending unit I'll need to have a 'fairly accurate' reading on the fuel guage????

Any help is appreciated.

Electrically challenged JM

Bob Putnam · #2 (**permalink**) 02-23-2002, 04:21 PM

John,

The S/W 2 5/8" gages that we use require the "normal" 33(full tank)-270(empty) ohm sender. I don't know the gage's internal resistance offhand. What's happening with yours?

John McMahon · #3 (**permalink**) 02-25-2002, 01:10 PM

Bob,

Thanks for responding....

Nothing is wrong, I was just concerned because a friend of mine had the same fuel cell and with his Smith guages, he never got a reading until he changed his sending unit.

I just wanted to make sure that I didn't have the same problem.

The tank has yet to see fuel, so it is bone dry and reading 250 ohms.

Sounds like, based on what ERA is using, I should be ok.
Is that a true statement?

Just being proactive, I don't want to pull the tank later on if I don't have to.