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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. is the premier BMW Forum on the internet. Registered Users do not see the above ads.
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Old 05-07-2008, 09:35 AM   #1 (permalink)
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Join Date: Nov 2005
Location: Timisoara, Romania
Car: E36 325i 24v Coupe
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Unhappy Problem with the fuel indicator

Hope someone can help me with this...

The fuel indicator on my 325i is not working, sowing empty all the time and the red light from it is on. The fuses are ok, the cables inside the dashboard are ok and plugged in corectly, and i wanted to check the fuel sensors (i don't know the technical name for those in english, but i know how they look like and how they work) inside the tank, but I don't know how to get to them. I took off the rear seat and i have (probably) 2 sensors, cause on the left side and also on the right side are 2 round robber disks mounted on the car body, having some wires which goes inside. If someone knows, are the fuel sensors there, and if yes, how can i remove them out for checking?
Thanks in advance.

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Old 07-18-2008, 01:05 PM   #2 (permalink)
Join Date: Aug 2007
Location: Germany
Car: 1992 BMW 318i
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Yes, the fuel sending units are under those two covers. Just remove the four screws that hold each cover in place and remove them to gain access to the fuel sending units leads. The left side will have one plug, which is wired in series with the fuel sending unit on the right side, which will have two seperate plugs. On the right side, one plug is for the fuel pump and the other is for the fuel sending unit.

My guess is that the connection broke off from one of your fuel sending units. That's what happened to me. To test it, use an ohm meter. To fix it, remove the fuel pump/sending unit combo and solder the wire back to its lead. After that, reset the fuel gauge by testing the gauges (holding in the odometer trip reset button, then turning the key to the on position- keep holding the odometer button in until you see the gauges go up and back).
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