Checking fuel gauge / sending unit

767Jockey · #1 (**permalink**) 02-01-2007, 12:09 AM

I have the Smiths fuel guage and fuel tank sending unit out of my car now. Is there a way to bench check both units to see that they're working properly? Is there a way I can calibrate them or is this something that has to be sent out to an instrument shop? While I have the gas tank down, where can I get some of the large rubber fuel hose that connects the fuel filler to the gas tank? Thanks.

Ron61 · #2 (**permalink**) 02-01-2007, 02:25 AM

If you have a way to connect power and ground to the gage and sending unit, yes you can bench test them. I am not familiar with the Smiths sending unit but would guess that it uses the typical float and rheostat arrangement unless you have a new electronic one. If that is the case, just hook power and ground to the units and then move the rheostat and watch the gage. When all of the resistance is out the gage should read full.

Ron

slithering · #3 (**permalink**) 02-01-2007, 05:36 AM

As for your fuel hose, look for an industrial hose supply. Out here in CA there is a supplier, Delta Rubber, they will have what you need.

Chris

strictlypersonl · #4 (**permalink**) 02-01-2007, 09:05 AM

If you have a low-range ohmmeter you can measure the sender, but I'm not sure the range. If the sender has a 6-bolt pattern it may be 90-0 ohms. If the sender is 5-bolt, it could be any of several ranges.

Here's something I worked up for our GT. Testing

jerry w · #5 (**permalink**) 02-01-2007, 10:09 AM

I went to a Marine/Boat supplier for mine. Most large marinas have a boat servicing center that sells parts to fix boats. Boats have big fuel tanks, thus they need a big filler hose. Sold by the foot.

Regards,

Rick 427 Cobra · #6 (**permalink**) 02-01-2007, 10:21 PM

The large fuel hose is from a Mustang if memory serves. Someone with a Contemporary manual can give you the part number. The supplied tank with the kit was a 69 Camero unit with the stock sender. Not much you can do with it.
These guys make super senders, cut to fit your tank and gauge. http://www.centroidproducts.com/
If the tank has'nt been further modified by venting the very top of the tank as installed, you will never be able to fill it more than about 60%. This was commonly not done.
Former #3140 builder

Shelboss · #7 (**permalink**) 02-09-2007, 04:30 AM

West Marine or Napa sell fuel filler hose by the foot. 60's Mustangs used a small section of 2" diameter hose to connect the fuel filler to the tank, enough for one connection only.