Classic Mustangs List Archive

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Mail From: wal (Wal Marshall)

The fuel sender unit on my 69 is giving me silly readings..

A full tank reads 7/8 on the gauge, and 1/8 on the gauge comes up when the
tank is only 1/2 empty! Apparently the sender should move from 10 ohms when
full to 100 ohms when empty. I will remove and check next time the tank is
close to empty.

However the sender unit looks pretty new from the outside, as is the tank ,
so Im thinking that the PO has installed an incorrect unit when he replaced
the tank.

On looking around on the net at new sender units for 69's, there seems to be
quite a variety and as big a variation on price from $20 to $99.

Any comments from others re what sort of sender to buy.. Or not buy!

Cheers, Wal Marshall

This read-only message was archived from a public mail list.
Mail From: W427 (David)

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Mail From: wal (Wal Marshall)

Thanks for that David, Excellent info.

The partly sinking or heavy float option occurred to me just after i sent
the last message, so will check on that as well.

In looking at the available units I note that there are some US made
stainless steel senders that look to be reasonable quality, but it would be
good to hear from someone who has actually installed one.

Cheers, Wal

----------------------------------------------------------------------------
----
From: classic-mustangs-bounces at lists.twistedpair.ca
[mailto:classic-mustangs-bounces at lists.twistedpair.ca] On Behalf Of David
Sent: Monday, 8 December 2008 7:04 p.m.
To: Wal Marshall
Subject: Re: [CM] Fuel gauge sender units


Wal, last I heard (and it's been a while) they were all made by crappy
companies overseas - no matter the price. Also suggested has been to
attempt repair (cleaning) of originals for more reliable service. There are
a couple rebuilders out there, too. In any case, the senders are usually
referred to as "10-70 ohm" based on the shop manual tolerances. You can
simply probe the sender connector to ground for a quick reading. Sounds to
me like the wrong unit or a heavy/leaky float. Here's a snip:
<mustangmonthly.com/techfaq/mump_0101_1969_ford_mustang_cougar_xr
7_1965_ford_mustang_fastback_basic/1965_ford_mustang_convertible_manual_tran
smission.html>

David

-----Original Message-----
From: classic-mustangs-bounces at lists.twistedpair.ca
[mailto:classic-mustangs-bounces at lists.twistedpair.ca] On Behalf Of Wal
Marshall
Sent: Monday, 8 December 2008 5:53 p.m.
To: Wal Marshall
Subject: [CM] Fuel gauge sender units

The fuel sender unit on my 69 is giving me silly readings..

A full tank reads 7/8 on the gauge, and 1/8 on the gauge comes up when the
tank is only 1/2 empty! Apparently the sender should move from 10 ohms when
full to 100 ohms when empty. I will remove and check next time the tank is
close to empty.

However the sender unit looks pretty new from the outside, as is the tank ,
so Im thinking that the PO has installed an incorrect unit when he replaced
the tank.

On looking around on the net at new sender units for 69's, there seems to be
quite a variety and as big a variation on price from $20 to $99.

Any comments from others re what sort of sender to buy.. Or not buy!

Cheers, Wal Marshall

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Classic-mustangs mailing list
Classic-mustangs at lists.twistedpair.ca
lists.twistedpair.ca/mailman/listinfo.cgi/classic-mustangs

Visit the Classic Mustang Wiki! sauce.donair.org/~cm/ No virus found
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4:56 p.m.

This read-only message was archived from a public mail list.
Mail From: mustang (Bryan Fuller)

No matter what version you request or price you pay, it's a toss up. I've
seen just as many "quality" brass floats leak as "cheap" plastic ones. Often
times the more expensive ones leak around the sender post. Sometimes the
cheap ones read more accurately. Point is, it really makes no difference,
they are all susceptible to cheap manufacturing - If you get a bad one, send
it back and get another.

---
Bryan Fuller
mustang at wabba.net

-----Original Message-----
From: classic-mustangs-bounces at lists.twistedpair.ca
[mailto:classic-mustangs-bounces at lists.twistedpair.ca] On Behalf Of Wal
Marshall
Sent: Monday, December 08, 2008 12:36 PM
To: MUSTANG at wabba.net
Subject: Re: [CM] Fuel gauge sender units

Thanks for that David, Excellent info.

The partly sinking or heavy float option occurred to me just after i sent
the last message, so will check on that as well.

In looking at the available units I note that there are some US made
stainless steel senders that look to be reasonable quality, but it would be
good to hear from someone who has actually installed one.

Cheers, Wal

----------------------------------------------------------------------------
----
From: classic-mustangs-bounces at lists.twistedpair.ca
[mailto:classic-mustangs-bounces at lists.twistedpair.ca] On Behalf Of David
Sent: Monday, 8 December 2008 7:04 p.m.
To: Wal Marshall
Subject: Re: [CM] Fuel gauge sender units


Wal, last I heard (and it's been a while) they were all made by crappy
companies overseas - no matter the price. Also suggested has been to
attempt repair (cleaning) of originals for more reliable service. There are
a couple rebuilders out there, too. In any case, the senders are usually
referred to as "10-70 ohm" based on the shop manual tolerances. You can
simply probe the sender connector to ground for a quick reading. Sounds to
me like the wrong unit or a heavy/leaky float. Here's a snip:
<mustangmonthly.com/techfaq/mump_0101_1969_ford_mustang_cougar_xr
7_1965_ford_mustang_fastback_basic/1965_ford_mustang_convertible_manual_tran
smission.html>

David

-----Original Message-----
From: classic-mustangs-bounces at lists.twistedpair.ca
[mailto:classic-mustangs-bounces at lists.twistedpair.ca] On Behalf Of Wal
Marshall
Sent: Monday, 8 December 2008 5:53 p.m.
To: Wal Marshall
Subject: [CM] Fuel gauge sender units

The fuel sender unit on my 69 is giving me silly readings..

A full tank reads 7/8 on the gauge, and 1/8 on the gauge comes up when the
tank is only 1/2 empty! Apparently the sender should move from 10 ohms when
full to 100 ohms when empty. I will remove and check next time the tank is
close to empty.

However the sender unit looks pretty new from the outside, as is the tank ,
so Im thinking that the PO has installed an incorrect unit when he replaced
the tank.

On looking around on the net at new sender units for 69's, there seems to be
quite a variety and as big a variation on price from $20 to $99.

Any comments from others re what sort of sender to buy.. Or not buy!

Cheers, Wal Marshall

_______________________________________________
Classic-mustangs mailing list
Classic-mustangs at lists.twistedpair.ca
lists.twistedpair.ca/mailman/listinfo.cgi/classic-mustangs

Visit the Classic Mustang Wiki! sauce.donair.org/~cm/ No virus found
in this incoming message.
Checked by AVG - avg.com
Version: 8.0.176 / Virus Database: 270.9.15/1835 - Release Date: 7/12/2008
4:56 p.m.

_______________________________________________
Classic-mustangs mailing list
Classic-mustangs at lists.twistedpair.ca
lists.twistedpair.ca/mailman/listinfo.cgi/classic-mustangs

Visit the Classic Mustang Wiki! sauce.donair.org/~cm/