Can someone verify...fuel sender resistance - The 1947 - Present Chevrolet & GMC Truck Message Board Network

red71cheyenne · 12-29-2006, 05:27 PM

For me? I think its supposed to be 90 ohms. My gas gauge in the Blazer wasn't working, so I dropped the tank to mount the bumper brackets. Pulled the float, its reading infinity on full and a short at empty. I don't think thats right. Its new too. Really makes me mad. Sorry rant off. Just need to know the resistance for sure before I order another new one. Thanks, Jeff.

49studebaker · 12-29-2006, 06:25 PM

The new sending units say 0 ohms empty, 90 ohms full. I would measure it with the float somewhere in between, but it dos look to be rather hosed.

John @ BROTHERS · 12-29-2006, 06:55 PM

Sender should read 0 ohms at empty and 90 ohms at full. I have tested a few hunderd of our sending units and the readings vary a little. They usully read about 1.3-2 ohms at empty and 88-92 ohms at full.

beater69 · 12-29-2006, 10:20 PM

i've taken the sending unit apart and reworked them before with pretty good success. carefully remove the cover, clean up the contacts and bend the spring a little to increase the contact pressure (be very careful not to break it!!) that might help, no promises though. hope this helps

red71cheyenne · 12-30-2006, 12:40 AM

Ya, no joy repairing . I think I made it worse. For some reason, it was super rusty, and the contact was not making. It worked for a minute and then opened back up. Guess I'll be buying a new one again. Thanks guys, Jeff.

12-29-2006, 05:27 PM	#1
red71cheyenne Back in the sticks Join Date: Jan 2001 Location: Fordland, MO Posts: 3,188	Can someone verify...fuel sender resistance For me? I think its supposed to be 90 ohms. My gas gauge in the Blazer wasn't working, so I dropped the tank to mount the bumper brackets. Pulled the float, its reading infinity on full and a short at empty. I don't think thats right. Its new too. Really makes me mad. Sorry rant off. Just need to know the resistance for sure before I order another new one. Thanks, Jeff. __________________ 1971 Cheyenne C-10 w/700R4 and Tuned Port Injection 1969 K5 Blazer w/Tuned Port 2010 2SS/RS Flaming Orange Camaro 2011 K1500 Suburban 2014 K1500 Pickup 2008 Nissan Altima? The wifes' hoopty

12-29-2006, 06:25 PM	#2
49studebaker Senior Member Join Date: Nov 2005 Location: Victor, Montana Posts: 386	Re: Can someone verify...fuel sender resistance The new sending units say 0 ohms empty, 90 ohms full. I would measure it with the float somewhere in between, but it dos look to be rather hosed. __________________ 04 4x4 GMC Ext. Cab lifted 71 2wd GMC / Ramjet 350 ready for sheet metal 49 Studebaker pickup

12-29-2006, 06:55 PM	#3
John @ BROTHERS Registered User Join Date: Jul 2000 Location: Corona, CA Posts: 310	Re: Can someone verify...fuel sender resistance Sender should read 0 ohms at empty and 90 ohms at full. I have tested a few hunderd of our sending units and the readings vary a little. They usully read about 1.3-2 ohms at empty and 88-92 ohms at full. __________________ 1967 Chevy Short/Fleet 1969 Chevy Short/Step 2004.5 Dodge 2500 4x4 Cummins 6spd

12-29-2006, 10:20 PM	#4
beater69 Sinister Exaggerator Join Date: Feb 2006 Location: Eugene, Oregon Posts: 111	Re: Can someone verify...fuel sender resistance i've taken the sending unit apart and reworked them before with pretty good success. carefully remove the cover, clean up the contacts and bend the spring a little to increase the contact pressure (be very careful not to break it!!) that might help, no promises though. hope this helps __________________ 69 c10 Chevy Long Fleet 350/350 under construction Poor man's disc brake upgrade with HydroBoost from '82 diesel Blazer tank with "John Fabris" stake pocket filler (Genius!)

12-30-2006, 12:40 AM	#5
red71cheyenne Back in the sticks Join Date: Jan 2001 Location: Fordland, MO Posts: 3,188	Re: Can someone verify...fuel sender resistance Ya, no joy repairing . I think I made it worse. For some reason, it was super rusty, and the contact was not making. It worked for a minute and then opened back up. Guess I'll be buying a new one again. Thanks guys, Jeff. __________________ 1971 Cheyenne C-10 w/700R4 and Tuned Port Injection 1969 K5 Blazer w/Tuned Port 2010 2SS/RS Flaming Orange Camaro 2011 K1500 Suburban 2014 K1500 Pickup 2008 Nissan Altima? The wifes' hoopty



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