My car has recently developed a problem regarding the reading of the fuel gauge. It seems to read properly at full and all the way down to about 3/4 of a tank. Anything below that it just suddenly drops to below empty.
Just wondering where I might start to source out this problem?

Thanks

Rick
90 GT

 

WELL....you have ONE of two problems.....its either the sending unit....or the gage itself....for all that is inbetween the two is wires. you could check the continuity of them too.

 

You may need to replace your fuel pump. In our cars, the fuel pump has the fuel gauge meter on it. It's similar in design to the TPS, if I'm not mistaken. So it works for you while the tank is full, but as you said, once it goes beyond 3/4, it simply drops below empty. The contacts may be corroded. If you're a radio shack guy, you could prolly replace the meter, but then you would have to calibrate it, which would be a major pain in the ***. Thus, it is much easier to simply replace the fuel pump assembly all together. You can make an inspection of the meter buy taking up the rear seat, removing the metal protective cover, disconnecting the wire plug, and then removing the fuel pump seal. From there you can take it out and see and possibly looking at the fuel gauge meter. I'd buy the new fuel pump and then work on the one from your car, that way if you can fix it or break it beyond repair, you have something to replace it with.

It would prolly be cheaper to look around parts yards and see if you can source a used fuel pump. (Being me, and the part coming from a yard, I wouldn't trust the pump itself and land up trying to exchange the fuel gauge meter from part to part.)*shrug*