UH OH
This one may actually be a worn out sending unit. The float arm moves the point contact up and down a wire wound resistor to get different ohm readings. If the resistor has a break in it, the guage will only read from the break to zero. Anything above the break would go past full.
So if the break was at 1/4 tank range (22.5 Ohms) the guage would work from there to empty and anything above that level is off the scale.
I'm afraid you're going to have to pull the sending unit out for further testing/inspection.
Could be a bad connection through the mounting plate. What pretty much put the final touches on this fuel guage thread.
EDIT
What Greg said while I was typing sloooow
__________________
All the federales say,they could've had him any day
They only let him slip away, out of kindness...I suppose
Poncho & Lefty
Last edited by "QUICK-SILVER"; 02-20-2014 at 11:20 PM.
Reason: too slow
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