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!
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See my '68 RS/ZZ4 (http://www.100megsfree.com/choptop/camaro.html)

[This message has been edited by choptop (edited 12-07-2002).]

Here's a good link for fuel gauge/sending unit diagnosis:
http://members.core.com/~faldrich/fuelgage.htm

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JohnZ
CRG
'69 Z28 Fathom Green