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Inaccurate C3 fuel reading

I have a 76 and the fuel guage is all over the map. It seems to be sticking.

It usually will read right off the map - full, full, full. Then If I stop or decelerate suddenly it will go down to where the normal reading should be and I know how much gas I have. Sometimes it seems ok for awhile with proper reading and then it will start this again.

I did get a replacement fuel sender for this, but it looks like I have to drop the tank just to change fuel sending units and would like to be sure.

Any clues on what else I could check first?

TIA

PS. For anyone who was reading older posts I did get the new composite spring, shocks done and then recored the rad and replaced the rad support on it so that is all good to go now!

Reply to
BSAKing
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Sounds like the ground wire to the tank and sending unit. Check for broken wire or corroded connection.

PDDeen

Reply to
PDDeen

think on that year I have to drop the tank just to do all of that, so I'd better have a replacement send unit on hand as well I guess.

Reply to
Bowser

It needs a new sending unit. There is a resistor inside that slows the movement down that goes bad. Common occurance, my 81 has the same thing. I didn't think GM sold the sending unit.

If this were a Chysler Product the guy in the service department would have his most common response. "Yeah, they all do that"

Reply to
Speaker of the Truth

I picked up a sending unit from the US of A np. I do have to drop the tank on a 75-77 model, so it will be awhile before I get to it. Thanks. I'll check the grounds, etc when/if I am in there.

Reply to
Bowser

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