The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - I think i have bad sending units in my 76, anyone have bouncing fuel guages??

rfmaster · 04-19-2009, 03:10 PM

Ryan
Fuel sending unit in our trucks operated over the following range: 0 ohms empty, 90 ohms full. As previous poster stated check electrical grounds between gas tank ground tab (located on the top of the sending unit) and frame of the truck. These are commonly overlooked, broken in haste, etc. Expect to replace gas tanks as moisture may have rotted gas tanks from inside.

//RF

Good luck

04-19-2009, 03:10 PM	#3
rfmaster Registered User Join Date: Oct 2003 Location: OC CA Posts: 1,374	Re: I think i have bad sending units in my 76, anyone have bouncing fuel guages?? Ryan Fuel sending unit in our trucks operated over the following range: 0 ohms empty, 90 ohms full. As previous poster stated check electrical grounds between gas tank ground tab (located on the top of the sending unit) and frame of the truck. These are commonly overlooked, broken in haste, etc. Expect to replace gas tanks as moisture may have rotted gas tanks from inside. //RF Good luck __________________ "The Beast" 1975 Chevrolet C20 longbed 350/700R4! with 3inch body lift Dual Flowmasters Super 40's! TBI retrofit completed (2007-07-29) New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17)