Ya..that was a fun night. Next time the car gets low on fuel I'm going to grab my fuel jug and go for a drive and see if it reads correctly at the lower end of the spectrum now that it has had a full empty and full fill cycle. At least this time I wont be stranded waiting for friends, but I'm hoping it will read correctly now and give me a low fuel light and not run empty showing 1/8 of a tank as it did the other day.
Calibration is usually necessary after replacement of the fuel tank, fuel level sensor or instrument cluster. This requires removing and refilling with exactly12 liters of fuel. Then using a PST2 (or PIWIS tester) to re-calibrate the cluster.
You might try just filling the tank and disconnecting the battery and then reconnecting the battery which should give you a minor recalibration as it resets everything.
Exactly how do you get exactly 12 liters of fuel in the tank, short of draining it?
Should I first try filling the tank completey and re-setting the DME and cluster by removing the battery lead for a minute first?
This brings me to another question: is there a similar process to calibrate the oil level gauge? So far it appears accurate, as the previous readings from the 986 cluster and the 996 cluster agree, which also corresponds to the dipstick readings.
I would try filling the tank and then resetting by disconnecting the battery and reconnecting it. It's definitely worth a try. I filled my tank in preparation of swapping out the cluster. I'm doing mine over the next couple of nights. Worst case, I'll take it in to have it recalibrated. I can just imagine what that would cost.
I don't think you can calibrate the oil pressure gauge. But I could be wrong and probably am.
Well, I'm going to fill it up and re-set the DME and cluster and see if its happy as the fuel level goes down... if all else fails, I suppose I'll have the stealership calibrate it.
As to the oil, I only asked if it was possible/ should be calibrated since my seems to be accurate still.
If you have to have the stealership calibrate your fuel gauge, you might pose the question about the oil pressure gauge. They might be able to check to see if it accurate as well.
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