72 Roadrunner fuel sending unit question

[JG1966]

My gas gauge isn't working. The gauge itself works (I did the ground-the-sending unit test and it pegged to full) and the unit is definitely grounded. I tested ohms and got between 140-80. It has at least 3 gallons of gas in it, but it's reading empty. So, I'm fairly certain it's sending unit related. My question. Is it worth dropping fuel tank to get easier access to sending unit or can I do it with tank on car? I don't have a lift so it would be on car ramps but I get a good view of unit. Anyone have experience with this specifically on a 71-72 RR or Satellite? For what it's worth, the straps and bolts are not rusted much, the tank was pulled at some point recently and they should cooperate if I decide to drop it. Thanks.

 

[BeatersRus]

im literally working on a sending unit right now,
tabbed over and saw your post.
read this page.
http://www.tanksinc.com/index.cfm/page/ptype=results/category_id=159/mode=cat/cat159.htm

 

[JG1966]

im literally working on a sending unit right now,
tabbed over and saw your post.
read this page.
http://www.tanksinc.com/index.cfm/page/ptype=results/category_id=159/mode=cat/cat159.htm

Thanks Rus. I actually had read that already. It was helpful but it doesn't address whether or not a sender unit on a 72 RR can easily be removed without dropping the tank.

 

[PurpleBeeper]

Well, on every B-body I've seen you can "get at" the connections to the sending unit from under the car, but cannot remove it without dropping the tank.

 

[65cgretired]

My gas gauge isn't working. The gauge itself works (I did the ground-the-sending unit test and it pegged to full) and the unit is definitely grounded. I tested ohms and got between 140-80. It has at least 3 gallons of gas in it, but it's reading empty. So, I'm fairly certain it's sending unit related. My question. Is it worth dropping fuel tank to get easier access to sending unit or can I do it with tank on car? I don't have a lift so it would be on car ramps but I get a good view of unit. Anyone have experience with this specifically on a 71-72 RR or Satellite? For what it's worth, the straps and bolts are not rusted much, the tank was pulled at some point recently and they should cooperate if I decide to drop it. Thanks.

 

[65cgretired]

on my 65 Plymouth the the sending unit had hole, was able to remove with tank on car

 

[440+6]

1970 comes out with tons of room without removing the tank.
Since you only have three gallons it should be plenty low not to spill out, give it a try with the tank in.

 

[JG1966]

Well, on every B-body I've seen you can "get at" the connections to the sending unit from under the car, but cannot remove it without dropping the tank.

Thanks Purple.

 

[72RoadrunnerGTX]

Yes, the sender can be replaced fairly easily without dropping the tank on '71-72 b-bodies.

 

[JG1966]

Yes, the sender can be replaced fairly easily without dropping the tank on '71-72 b-bodies.

Thanks GTX. I'll give it a try.

 

[BeatersRus]

lol whoops okdokey.
hey,when you get the old one out,
plug it back in and try seeing what happens when you move the float.
mine works so the ground must have been crusty.