924Board.org

Which car to buy? · Joined: 24 Mar 2003 Posts: 163

Not at all. No jerking around or movement at all. Where are the grounds for a 77? In tank sender?

81turbo · Joined: 03 Nov 2002 Posts: 1065 Location: Oakland, CA

Try cleaning the contact points on the sender unit. Lift up the rear luggage area carpeting and pop out the rubber circluar cover.

jl924t · Joined: 03 Nov 2002 Posts: 214 Location: Surrey, BC Canada

The grounds are located by the left tailight.
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1980 924 turbo

Roger · Joined: 06 Jan 2003 Posts: 1235 Location: Cordova, TN

Try cleaning the contacts, but I would bet the problem is the sending unit itself. Failure seems common.
_________________
1981 924 NA

Some people are like Slinkies. Not really good for anything, but you
still can't help but smile when you see one tumble down the stairs.

numbbers · Posted: Tue Dec 16, 2003 11:27 am Post subject:

If you can't get it to work by smacking the guage, then it is most likely the sender located in the tank. The sender gets a coat of varnish on it from old gas when these cars set for a while. And most of them have had one or more periods of extended downtime.

The sender is removed from the top of the tank while it is still in the car. Look under your rear mat, and yow will see the access hatch for the sender. You can remove the access hatch locking ring with a screwdriver and a hammer. It is very easy.

The sender is located inside the tube under the hatch. It is just a piece of wound nichrome wire with a slider on a float. Clean both the wire, and the slider with 600 grit sandpaper (nothing ruffer), or crocus cloth, and bend the slider to put a little more tension on the contact with the wire. Put it back together, and it will work fine.
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1980 924 Turbo

Smoothie · Posted: Tue Dec 16, 2003 11:42 am Post subject:

If you try cleaning the delicate wires of the sender, be extremely careful. (Or at least a little more careful than I was) I wound up breaking one loose at one end and had the fun of soldering it back on added to the task, then with it all cleaned and reassembled, it read exactly the same as it did before. -So in my case, cleaning it turned out to be a waste of time. I've also cleaned up the ground near the taillight and that didn't help, but alas, go forth and fix. Hopefully you'll have better luck than I.
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"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

Phogphire1 · Joined: 05 Apr 2003 Posts: 293 Location: Portland, OR

dpw928 · Joined: 02 Nov 2002 Posts: 1860 Location: owasso, ok 74055

The sender on my 931 was erratic if it worked at all. Found the ground wire attached to the sending unit was loose. Tightened it up by recompressing the attachment nipple and now it works fine. Hope your solution is as simple.

Dennis
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81 931 5 sp
78 928 5 sp Silver
78 928 AT Euro Black

Which car to buy? · Joined: 24 Mar 2003 Posts: 163

Thanks guys it was simple. But hindsight is 20/20! Thanks!

Joes924Racer · Posted: Thu Dec 25, 2003 5:12 pm Post subject:

Hey mines dead in the water also. Ever since I had a wire burn behind the dash. Its happend twice the second time was a headlight switch wire.
The firast time involved a wire on the terminal that plugs into the guage
that houses the gas guage. The far left one. I have not checked the sender yet and will soon. Are there any tests I can do with my multimeter to check the sender. I dont like not having a gas guage. What should I do.

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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Roger · Joined: 06 Jan 2003 Posts: 1235 Location: Cordova, TN

Never done it but I would test the sender by measureing the resistance.
_________________
1981 924 NA

Some people are like Slinkies. Not really good for anything, but you
still can't help but smile when you see one tumble down the stairs.

Ordrune · Joined: 29 Nov 2002 Posts: 40 Location: Sydney, Australia

I sprayed the contacts(both sides but mainly the underside) on my sender unit with heaps of de-watering fluid which got the juice flowing through the die-cast cover rivets.
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'79 924 supercharged,intercooled

Joes924Racer · Posted: Wed Jan 14, 2004 8:02 am Post subject:

Im asking is there a contact or a ground involved
with the bunch of wires to the guage that holds the guage

I have to check the sender out. Its the only
thing left not working. We all know the importance of
this guage. Idont want to be with out a gas guage
oil pressure is one thing though the gas guage is
where its at. If you plan on driving & I do here with-in
the near future.
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Sat Jan 24, 2004 3:12 am Post subject:

Senders out theres 3 wires,one copper and the wrap around.
The float came out easy enough..
_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

Joes924Racer · Posted: Sat Jan 24, 2004 4:30 am Post subject:

No luck. Im gonna go to my secret 924 stash..you know
my other 924 cars & get another to try..I done think its
the sender cause there was nothin wrong with it .
I used 1000 grit on the wires and cleaned up
the contacts put it all together. No worky.

_________________
1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.