sending unit resetting? - Team Camaro Tech
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post #1 of 2 (permalink) Old Dec 7th, 02, 07:26 AM Thread Starter
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Join Date: Jun 2000
Location: Austin, TX
Posts: 1,988
Here is a strange question that I could not find answered in the archives. Is there a procedure for resetting the sending unit/ gas gauge? I have dropped the tank before for suspension work and just reconnected everything and it worked fine that time.

I just finished refurbishing my gas tank: cleaned out the inside, new strainer, sending unit gasket & retaining ring, filler tube connector and rubber fuel line. When I re-installed the tank I made sure all the electrical connections were clean and tight.

I put a few gallons of gas into the tank and fired up the engine when I see the gas guage pegged way past full. ??? Oh crap! So I drop the tank again and start playing with the connections. I hook up a ground wire extension, then unhook the sending unit connector with the circuit energized. The gauge is still pegged past full. Then I reconnect the sending unit wire while the circuit is energized and the gauge goes back to reading normally again.

Do I have a bad sending unit?

Edit: I disconnected the positive battery terminal after getting the gauge to read normally (ignition switch was off) and then it goes back to being pegged past full! Argh!
See my '68 RS/ZZ4

[This message has been edited by choptop (edited 12-07-2002).]
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post #2 of 2 (permalink) Old Dec 7th, 02, 09:21 AM
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Join Date: Sep 2000
Location: Washington, Michigan USA
Posts: 7,728
Here's a good link for fuel gauge/sending unit diagnosis:

'69 Z28 Fathom Green
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