I was finally able to get my Great-grandfather's 1961 Oldsmobile Nintey Eight Sport Sedan that he bought brand new. It's been sitting for quiet some time and hasn't been tagged since '87. My fuel tank is rusted out from the inside. I found a local company that has a tank for 1961 Oldsmobile Passenger cars. The size and pictures look the similar. I need a fuel level sender. My original is rusted solid. That company has a 0-30 ohm sender that you can get. Spec says the sender is 158 to 164 ohms. I've already found out parts are kinda tricky to find. I'm guessing this sender will not read properly. Does anyone know what sender will work for this?

 

Here's one.


Sending unit for 1961-1964 Oldsmobile 88 & 98 passenger car | eBay

 

Yeah that's the one from the local company. Mine is the 2 pin style like it says since early ones were. It's cheaper to get the tank and sender, than it is to get both separately, at least their ebay site has the combo not sure about their website. Just not sure if it will work or not. Might not be bad to get both. Could always test the sender before installing the tank.

 

 

I think getting both would be a good move too.
Auto City Classic just recently came out with these tanks'
Before that, a good 61 thru 64 tank was hard to find.
You will need to cut a portion of the filler neck off the old tank , and graft it on to the tank with the supplied rubber hose.

 

Yeah I think that the plan. They are only 15 minutes up the road from work. My filler neck is in good shape so it should work well.

 

All 1964-older GM gas gauge sending units are 0-30 ohm. That 158-164 ohm spec is for testing the resistance wire from one end to ground. It is not the signal that the gas gauge sees.

 

OK, Thanks. The diagnosis for the sender says to use a known good one. Maybe they learned to write the diagnosis better and now tell what the specs of the sender should be instead of saying "use a known good part". I'll be picking up one of those new tank and sender package from that local place soon.

 

Update...I've had the tank and sending unit in the car for awhile. Drove it to my new house on Jan 1st. Haven't driven it around since except to pull it out of the pole barn to get stuff behind it. I had bought the Auto City Classic sending unit and tank. I put about 2 gallons in it. My fuel gauge reads Full when it's empty. I measured resistance at the sending unit and from the center terminal to the body is 3.8 Ohms. With the sensor disconnected, the gauge just hangs, like the car is off. I have the Yellow wire on the center bolt and the black wire on the sending unit ground strap. This is normally how they are but is there a chance that this is backwards oh this Vehicle? Maybe the unit is internally shorting but the only way to check the swing is either fill it up or remove it and check the resistance while swinging the float. I haven't pulled the sending unit since I used Aviation sealant on the gasket and didn't really want to pull it if I don't have to.

 

Decided to pull my fuel level sensor. It wasn't reading anything after I pulled it out and measured the resistance as I was moving the float. Ordered a replacement. Checked the resistance and it was close to the 0-30 ohms. Used a jumper so I could see the gauge and move the float. It read Empty all the time. I looked at the repair manual and they talked about check at fast idle. Since I had my old sender out, I didn't have enough fuel to try and start it again, and decided to install the new one. Got it installed and added a few gallons so it should read maybe under 1/2 a tank. Looked at my gauge when I turned the key and it read full. I guess I need to start measuring wire resistance to see where there is an issue.