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Registered
Join Date: Nov 2019
Location: Central Connecticut
Posts: 571
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sounds like the sending unit is bad if it goes to zero when you ground at the sending unit. i would recommend swapping out the sending unit. if i remember correctly if the sending unit fails open it maxes out the gauge and if fails closed ( shorted) the gauge goes to zero.
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Ned G. 1976 row turbo i/c k27raptor turbo sc cams in a 80sc wide body
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