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Gas gauge needle floats around. Very weird. Is it fuel sending unit or cluster?

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Old 01-10-2005, 12:09 PM
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Default Gas gauge needle floats around. Very weird. Is it fuel sending unit or cluster?
Just had the cluster replaced in November.
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Old 01-10-2005, 12:38 PM
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mine was sticking on startup and it was the cluseter. dealer replaced it under warranty.
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Old 01-10-2005, 12:41 PM
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Default had this problem too...
cluster replaced first (didn't fix, but gave me the familiar 'lights on, dumbass!' ding), then sending unit

problem solved
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Old 01-10-2005, 12:42 PM
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Default If the gauge shows full until around 250 miles then drops...>>
chances are it's the sending unit. If you have a Quattro then you have 2 sending units. The sending unit in the passenger side is intergrated with the pump and is $$$ and that's the one that is the problem.

Try this - put a bottle of STP gas treatment or Chevron Techron before you fill up then fill the car up. This might take a couple bottles, but it works.
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Old 01-10-2005, 01:37 PM
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Hmm. Makes me wonder if this is a reasonable preventative every year or so.
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Old 01-10-2005, 02:52 PM
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Thanks for all the info. guys!!
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Old 01-10-2005, 03:18 PM
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When mine was floating, they replaced the cluster.
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Old 01-10-2005, 03:22 PM
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I put a bottle in every 6 months. No problems for 3 years.
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