Erik,
I bought a new sending unit 3 years ago from BPNW and it works better
than the original. It was made in South America, which cocerned me a
little at first, but then I figured it couldn't be much worse than the
malfunctioning one in the tank, and it was embarrassing using the"broom
stick gauge" method, so I took a chance. So far, so good.
Good luck,
Jim Davis
Fortson, GA
'75 TR6 CF38690UO
'75 TR6 CF37325U
On Wed, 20 Aug 1997 11:16:32 -0400 (EDT) DANMAS@aol.com writes:
>In a message dated 97-08-20 10:50:18 EDT, erik.quackenbush@scala.com
>writes:
>
>> The fuel gauge in my TR-6 reads correctly when the tank is full and
>when
>> the tank is less than half full. The rest of time it reads almost
>empty.
>> Any suggestions? Does this sound like a mechanical problem?
>
>Erik:
>
>This is just a guess, but it sounds like you have a problem with the
>sending
>unit. The sending unit consists of a small insulater with a piece of
>fine
>resistance wire wrapped around it. The float is connected to a wiper
>arm that
>moves across the wire as the fuel level changes. When the tank is
>full, the
>wiper arm is close to the power side of the winding, and the gauge
>sees
>little resistance (with respect to the battery voltage). When empty,
>the arm
>is close to the ground side, and the gauge sees a high resistance.
>Sometimes,
>the windings get spread apart, and there is a gap, where the arm sees
>an open
>circuit, causing an empty reading, and sometimes dirt will accumulate,
>causing the arm to see a high resistance, again causing an empty
>reading.
>
>You might try removing the sender, and VERY carefully attempt a
>repair,
>either cleaning or respacing the windings. I say very carefully,
>because I
>don't believe replacements are available, and it is a fragile
>assembly. Later
>today, I will try to measure the resistance range on my old, faulty
>sender,
>and see if it matches any of the available aftermarket units.
>
>Dan Masters,
>Alcoa, TN
>
>'71 TR6---------3000mile/year driver, fully restored
>'71 TR6---------undergoing full restoration and Ford 5.0 V8 insertion
>- see:
> http://www.sky.net/~boballen/mg/Masters/
>'74 MGBGT---3000mile/year driver, original condition
>'68 MGBGT---organ donor for the '74
>
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