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Originally Posted by MNBoxster
Hi,
Sorry, but that's inaccurate. The problem is not an uncalibrated gauge, it is a shifted overflow tube in the tank. If this tube shifts, it will interfere with the proper movement of the float for the fuel sender. The fix is to pull the tube from the tank, zip-tie it in place to keep it from migrating toward the fuel sender float, and reinstall. Hope this helps...
Happy Motoring!... Jim'99
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Not according to this FAQ page I found. This is what it says.
Gas Gauge Out of Calibration
Diagnostic: The gas gauge on the dashboard reads low even when the tank is filled.
Cause: Miscalibrated gas gauge.
Details: The gas gauge can be calibrated using the PST2 (Porsche System Tool 2). The gas tank must be completely drained. Then a precise amount of gasoline is introduced into the tank. Then the PST2 is used to calibrate the gauge needle.
Time in Shop: One hour.
Repair Instructions: Requires dealer repair.
Notes: None.
I copied this straight from the board. This sounds more like what he is experiencing. Tank shows a low reading and then later slowly rises to correct level. I had the same problem. It is very common in older boxsters.
