Hi,

My '67 dart's fuel gauge was working but only going up to 3/4 full when actually full tank. The temp gauge seemed to be working properly.

Recently, the fuel gauge quit, and the temp gauge would either read on the "E" of temp (nice and cool) or on the "P" of temp. The engine thermostat and cooling system are new, and I doubt there is actually a temperature difference, despite the two indicators. It seems to be randomly going to either spot, but always the same spot on any particular drive.

I changed the instrument panel regulator and the fuel gauge is still dead (might be sending unit or ground) but the temp gauge is doing the same thing, only at different points - now it goes to the "C" on the gauge (i.e. barely moves) or to the "E" of temp, but only one of those on any particular drive. So, still the same movement pattern, just different places on the gauge since I changed the regulator.

Question: is there another circuit or component that affects the TEMP gauge reading or is this likely the gauge itself giving up on me? Bad regulator? Are the new ones made in China and therefore junk?

Thanks all,

'67 Dart 270

First check if gage is working by pulling off wire from sending unit on tank, and grounding it to the frame with a jumper wire just long enough to see if the fuel gage goes to full. If it goes to full you probably need to make a better ground connection to sending unit.

The factory used a long metal jumper between the metal hose on sending unit at tank to bridge that rubber coupling connecting metal sending unit fuel tube to metal fuel line. In other words metal fuel line provided a ground source to sending unit. This method sooner or later fails from corrosion at fuel lines attachment clips, metal grounding clip rotting off or loosing good contact.

The fix is to replace that metal clip-on jumper, several venders carry this reproduction item such as Year One… (Never mind Year One, they have made their site imposable to navigate for a particular car, never mind a part for it), or clean a spot on fuel line and tube at sending unit, and clamp a wire to each spot with hose clamps to bridge the rubber coupling.

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC