Gas guage reading higher than it is. (1 Viewer)

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Joined
Jun 25, 2003
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Rixeyville, VA
My gas gauge on my 82 fj40 always seems to read about a 1/4 tank higher than it really is. there is no pressure under the gas cap....what could it be. a bad gauge
 
Bad sending unit or bad ground on the unit. I doubt the bad ground. Pull the main wire off the unit and ground it. Gauge should go to full. OEM book has a resistance check on the sender to test it.
 

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