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Re: Gas/Fuel Gauge wacky
Ralph50....
More than likely the cause of the malfunction of the gauge is that the contacts on the fuel sending unit are no longer making contact. Even though you said you bent the tabs to force contact, what has happened is the segmented resistors have failed. If you look closely when you remove the fuel pump unit again, you can see several segments on the fuel sending unit. The FSU uses a 5v reference and as the float arm drops down from gas being used, the resistance either gets higher or lower, depending on the way the system was designed, which in turn makes your gas gauge drop down to "E".
Take an ohm meter, and probe the 2 leads coming out of the FSU, and ever so slowly move the float arm up and down, and watch your readings. I can almost bet you'll see the ohm meter either drop out, or go excessively high.
Hope this helps.
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