Fuel Gauge Reading

[porsche986spyder]

Okay, there is an easy way to get the correct fuel reading. I have this same problem with my car. I found this out just by chance. This is for anyone getting slow fuel readings after fill up when you know you have a full tank or have just added more gas but it doesn't show it at first and then shows it slowly rise up after driving it for a while. The easiest way to get a correct reading is to turn your ignition key to the on position, all the way to the right, but without starting the vehicle up. Leave it in this position and then begin filling your gas tank up. While it is filling you can even sit in the drivers seat and watch the fuel needle go up along with the digital reading. Works every time and you will never have to guess if your car has a full tank of gas or not. After you start your car the levels WILL stay at the last reading. This works on partial fill ups as well. It's not a perm. fix, but it sure saves you money instead of having the fuel sensor/sendor unit replaced which is the main cause of this problem. Or paying the dealership to have it re-calibrated, which also seems to fix the problem. I would rather just sit and wait instead of spending a small fortune to get a correct gas reading.

[Padawan]

Thanks, but the problem I'm experiencing, and the one that j.fro was discussing is an actual issue with the fuel level reading itself. Regardless of how full my tank is, it will never register more than 5/8 - 3/4 or so. The problem appears to be with the float getting caught or stuck somehow inside the tank, which is what the TSB seems to address.

[j.fro]

Given that I had the Bentley manual and the TSB, it was a very easy job; maybe a 2 on a scale of 1-10. The manual and the TSB told me everything that I needed to disconnect and how to disconnect those things. The toughest bit is unscrewing the ring that holds the sending unit in the fuel tank. It takes a special tool, so you'll either have to get the tool or get creative.