So frustrated with this sending unit - The 1947 - Present Chevrolet & GMC Truck Message Board Network

FLcustom10 · 11-26-2011, 03:28 PM

I have 8 gallons of gas in the tank. That really should be enough for the gauge to register. It works perfectly when I take the sending unit out of the tank and lift the float with my hand. As soon as I put it back in the tank it goes to empty and stays there. It is the same result whether I have the unit grounded to the tank or if I use a separate grounding wire. I have proved to myself that the float will in fact float in a bucket of water. I'm about to decide that it just won't float in gas. Could it be hitting the side of the tank somehow and binding? I can tie a wire around the float and lift it and the gauge will register, but when I release it the gauge goes back to empty. Shining a flashlight down there it looks like the gas level is at least up to the first indentation in the tank.

1972RedNeck · 11-26-2011, 03:41 PM

I had to bend the new one to go in our '60 Chevy. It was a ways out of wack.

BLACK AND BLUE 67-72 · 11-26-2011, 03:59 PM

When testing it did you put the lock ring on it? If not it may be a ground problem. Also if you reciently had your cab painted your tank may not be getting a good ground.

FLcustom10 · 11-26-2011, 04:09 PM

I think I've convinced myself it's not a ground problem. As soon as I lose contact with ground the gauge swings to past full. I'm going to go ahead and add 5 more gallons of gas and see what that does.

FLcustom10 · 11-26-2011, 04:33 PM

OK. After adding 5 more gallons it is registering 1/4 full. I think I have about 13 gallons in there. I hate to screw this up, but I guess it already is screwed up. I guess I'll try bending it to where it registers just under 3/4 ??

domeier · 11-26-2011, 04:41 PM

Quote:

Originally Posted by FLcustom10

:After adding 5 more gallons it is registering 1/4 full.

Dude: Your gas station is cheating you!

11-26-2011, 03:28 PM	#1
FLcustom10 Registered User Join Date: Feb 2007 Location: Tallahassee, FL Posts: 322	So frustrated with this sending unit I have 8 gallons of gas in the tank. That really should be enough for the gauge to register. It works perfectly when I take the sending unit out of the tank and lift the float with my hand. As soon as I put it back in the tank it goes to empty and stays there. It is the same result whether I have the unit grounded to the tank or if I use a separate grounding wire. I have proved to myself that the float will in fact float in a bucket of water. I'm about to decide that it just won't float in gas. Could it be hitting the side of the tank somehow and binding? I can tie a wire around the float and lift it and the gauge will register, but when I release it the gauge goes back to empty. Shining a flashlight down there it looks like the gas level is at least up to the first indentation in the tank. Attached Images

11-26-2011, 03:59 PM	#3
BLACK AND BLUE 67-72 Firefighter Join Date: Feb 2001 Location: Yellville, Ar, USA Posts: 1,943	Re: So frustrated with this sending unit When testing it did you put the lock ring on it? If not it may be a ground problem. Also if you reciently had your cab painted your tank may not be getting a good ground. __________________ '72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA

11-26-2011, 04:09 PM	#4
FLcustom10 Registered User Join Date: Feb 2007 Location: Tallahassee, FL Posts: 322	Re: So frustrated with this sending unit I think I've convinced myself it's not a ground problem. As soon as I lose contact with ground the gauge swings to past full. I'm going to go ahead and add 5 more gallons of gas and see what that does.

11-26-2011, 04:33 PM	#5
FLcustom10 Registered User Join Date: Feb 2007 Location: Tallahassee, FL Posts: 322	Re: So frustrated with this sending unit OK. After adding 5 more gallons it is registering 1/4 full. I think I have about 13 gallons in there. I hate to screw this up, but I guess it already is screwed up. I guess I'll try bending it to where it registers just under 3/4 ??



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