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Fuel Guage "floating"


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Fuel Guage "floating"
DiREW0LF
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#1

10-12-2009, 10:16 AM
The past two times I've had the car out I've noticed the fuel gauge "floats" about 1/8 tank above and below the actual reading. Are there any normal causes of this condition? It happens no matter how much fuel is in the tank. [img]style_emoticons/<#EMO_DIR#>/blink.gif[/img]
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1993 968 Cab, 6 speed - Airbox mod, RS Barn catback, RS Barn Stage 1 Chip, Sport Design wheels, M030 swaybars, Design 1 chassis braces (upper and lower)

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Johannvb
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#2

10-12-2009, 10:29 AM
I'm not sure how the 968's fuel sender work,and PET is not very enlightening on this, but I know in my 356 this happened when the fuel in the tank splashes around. I believe modern cars have electronics to even out the signal, so my guess is that you fuel sender is not working correctly anymore
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flash
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#3

10-12-2009, 11:31 AM
there is a baffle in the tank that is there to prevent the sender from getting bounced around and has been known to pop loose - that is probably what happened
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alex-uk
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#4

10-12-2009, 04:38 PM
I had problems with both fuel and temp gauges bouncing. Resolved this by tightening the nuts on the back of the gauges which I believe are the earth connections to the printed circuit.
Alex
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flash
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#5

10-12-2009, 04:51 PM
if it "bounces" (quicker change) it's probably electrical - if it "floats" (slower change) it's probably mechanical
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DiREW0LF
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#6

10-13-2009, 09:54 AM
It definately floating. And it does seem to be related to the fuel moving in the tank. Going up or down rolling hills on the highway can cause it, even a slight decline going out of the driveway. I know the level will change some when on an incline but this happens on anything other than perfectly level ground.

Flash, how hard is it to get to this baffle? I would check the manual or pet but don't have either of them at work.
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1993 968 Cab, 6 speed - Airbox mod, RS Barn catback, RS Barn Stage 1 Chip, Sport Design wheels, M030 swaybars, Design 1 chassis braces (upper and lower)

2009 Dodge Ram 1500 Sport - Inferno Red\Slate Leather Int
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flash
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#7

10-13-2009, 11:29 AM
pretty sure you've got to drop the tank - that means dropping the transaxle
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(This post was last modified: 10-13-2009, 11:29 AM by flash.)
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unknown4u
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#8

10-13-2009, 02:32 PM
In my 92 it is possible to acces the floater from above the tank. The entrance is under the carpet in the trunk. But it's a tip, Don't know if a 6 speed is different.
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flash
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#9

10-13-2009, 02:45 PM
i don't think it's any different - i know the sender is there at the top, but i'm not sure about the baffle
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DiREW0LF
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#10

10-13-2009, 09:51 PM
Is the baffle welded or bolted in? I hope I can get to it from the top, I'm not really in the mood for pulling the transaxle.
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1993 968 Cab, 6 speed - Airbox mod, RS Barn catback, RS Barn Stage 1 Chip, Sport Design wheels, M030 swaybars, Design 1 chassis braces (upper and lower)

2009 Dodge Ram 1500 Sport - Inferno Red\Slate Leather Int
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flash
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#11

10-13-2009, 09:53 PM
since it's a plastic tank, i'm not sure
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