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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 07-05-2004, 04:39 PM   #1 (permalink)
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I noticed when I was driving in LA this weekend that my gas gauge is acting a little strange. When I let off the gas completely, the gas gauge soemtimes stays in the middle, usually around 20 mpg while I am moving. When I am at a slight roll, and have no gas, it will do the same thing. Sometimes the gauge will go 2 Zero when I have no gas though. Whats up with this? could it just be the harsh stop and go driving?... any ideas?
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Old 07-05-2004, 04:50 PM   #2 (permalink)
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Faulty sensor? gas sloshing around in the tank?
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Old 07-05-2004, 05:01 PM   #3 (permalink)
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what do you mean gas sloshing around? if i have half a tank, will this happen? ehhhhh..i hope my gas isnt being burned away when i dont want it to be
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Old 07-05-2004, 11:03 PM   #4 (permalink)
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happened to my car... it went away after about a week
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Old 07-05-2004, 11:56 PM   #5 (permalink)
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My fuel gauge has been acting goofy too. A couple of times when I have filled up the gauge goes all the way to empty and stays there. Then a day or so later it starts working again. Strange....
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Old 07-07-2004, 01:49 PM   #6 (permalink)
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i mean the gauge that tells you how many mpg you are g etting. not how much gas you gots
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Old 07-07-2004, 09:32 PM   #7 (permalink)
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I'm pretty sure that the gauge that shows MPG is measured by fuel flow. Actually how much fuel your pump is told to push corresponding to your throttle movement.

If you let off the gas while going 35mph... then it will zoom to the left and be out of the veiwing areas... upwards around 40+ mpg. if you floor it... then it will go the opposite.... what your saying is that when your not going any where... its going towards the right side... around 8mpg????
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Old 07-08-2004, 04:17 AM   #8 (permalink)
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its ok now. when rolling and no gas, it was saying like 25 mpg. i was freaked
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Old 07-08-2004, 07:02 AM   #9 (permalink)
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Most common cause is a faulty fuel sending unit (either gummed up or contacts need cleaning). Unfortunately, for most of us it is in the fuel tank and co-located with the pump. I had similar problems with my 1988 750 and ended up replacing the sending unit.
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