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79porsche · Posted: Mon Dec 25, 2006 9:30 pm Post subject: Gas gauge question?

I was wondering why the marks on the gas gauge are not uniform. The mark which corresponds to 1/2 tank is not in the center of the gauge.

morghen · Joined: 21 Jan 2005 Posts: 9095 Location: Romania

i'm about to shoot the damn thing....i put 10-15 liters in the car and i do a few spins and the orange light comes on

thirsty thing !
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ushawk1 · Joined: 14 Jun 2006 Posts: 63 Location: Northwest, WA

Just about every BMW, Mercedes, Porsche, Audi, and VW gas gauge is like that with non evenly spaced marks. I came to a conclusion which everyone at the Euro auto shop I used to work at agreed with.........long story short.......the Germans calibrated the marks to correspond with the actual level of gas. The reading comes from the sender as an electrical resistance. Every notice in a lot vehicles (American cars especially) that they stay on full for a long time, then drop to 1/2, and plummet to E? It is far easier to calibrate the marks on the face then to calibrate the gauge itself. That is about the best we came up with.

And clean the sending unit. There is a tech article somewhere about it. I need to do mine. The gauge will never read right with a gunked up sender.
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79porsche · Posted: Tue Dec 26, 2006 9:50 pm Post subject: Gas vapor smell if too full...

Is there a known issue for the why there's a gas vapor smell if the tank is filled to the very top?

Ozzie · Posted: Tue Dec 26, 2006 10:28 pm Post subject:

There are several hoses on the fuel tank going to expansion tanks and charcoal canisters which perish.
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