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Old 12-29-2011, 03:28 PM   #5
auminer49r
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Join Date: Sep 2005
Location: Colorado Springs, CO
Posts: 10
Re: 72 Chevy C-10 Fuel Sending Unit Problem

Quote:
Originally Posted by fixit-p View Post
The gauge and sender should both be 0-90 ohm. You can also test the sender with a multimeter to verify that it is 0 ohm empty and 90 ohm full.
I will test the fuel sending unit tonight, out of the tank, with a multimeter just as you described. Judging by past needle locations on the fuel gage, I might expect a "full" float swing to read about 34 Ohms and an "empty" float swing to read about 11 Ohms (1/8th of 90 Ohms empty, and 3/8ths of 90 Ohms full). That'll be useful info. If that's the case, would I have a mis-matched gauge/sender combination? or, could something else change the 90 Ohm range that is required for the sending unit to function properly?

thanks, auminer49r
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