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Old 02-07-2011, 04:46 PM   #1
JINT
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E34 Gas Gauge Problem???!!!

Ok, i'm sick and tired of this problem already, i'm about to give up on it.
Did all the tests that the Internet suggests, the cluster works fine, the gauge moves all the way to full and back to empty when performing the cluster test.

Changed the whole fuel pump, nothing!!
Changed the level sender alone, nothing!!

The only thing it shows is the gas light which goes on when the tank is empty. The OBC never shows more than 60km range even on full tank.

help is MUCH APPRECIATED.
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Last edited by JINT; 02-07-2011 at 05:35 PM.
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Old 02-07-2011, 04:49 PM   #2
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Sorry for posting in the general section, reason is that noone ever goes on or responds in the 5 series section.
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Old 02-07-2011, 04:57 PM   #3
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Elaborate on the tests you performed. What do you mean the gauge moves all the way to full and back to empty? Did you try taking the sender out and flipping it upside down, so the float goes to the top - does the cluster show full then?
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Old 02-07-2011, 05:34 PM   #4
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Elaborate on the tests you performed. What do you mean the gauge moves all the way to full and back to empty? Did you try taking the sender out and flipping it upside down, so the float goes to the top - does the cluster show full then?
what i mean by that is the cluster test shows that the gauge works.

I flipped the sender upside down, the float went to full, the gas gauge still shows empty. Tried 2 senders, no luck, gauge still shows empty
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Old 02-07-2011, 06:04 PM   #5
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Ok, I don't know what this test is. But I guess it means the gauge wiring itself is ok. Try checking the continuity between the cluster and the sender. Should be able to find which connector/wire it is in the ETM.
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Old 02-07-2011, 06:29 PM   #6
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yeah, gonna do more tests tomorrow, ugh i hate following wires so much mess
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Old 02-08-2011, 01:57 AM   #7
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Have you heard of "the capacitors in the cluster board" problem in E34.

I heard a few things about it, seems to be a very easy fix and the parts dont cost alot.

Read up on this. It seems to be somewhat common on E34.
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Old 02-08-2011, 10:35 AM   #8
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Quote:
Originally Posted by BigD View Post
Ok, I don't know what this test is. But I guess it means the gauge wiring itself is ok. Try checking the continuity between the cluster and the sender. Should be able to find which connector/wire it is in the ETM.
I think he is talking about this type of test



Anyways, it sounds like a bad wire.
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Old 02-08-2011, 11:39 AM   #9
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Have you heard of "the capacitors in the cluster board" problem in E34.

I heard a few things about it, seems to be a very easy fix and the parts dont cost alot.

Read up on this. It seems to be somewhat common on E34.
i read up on it for hours already, the capacitors isn't my problem, i have a couple of clusters, they all act the same, can't be that they all have f@cuked capacitors. And plus capacitors act up when it's cold and than they work when it's warm, my gas gauge is simply dead.
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Old 02-08-2011, 11:48 AM   #10
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Igor, then I got nothing.
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Old 02-08-2011, 12:18 PM   #11
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Did you say it does seem to know when the gas is at a reserve level and turns on the amber light appropriately?
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Old 02-08-2011, 01:00 PM   #12
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Did you say it does seem to know when the gas is at a reserve level and turns on the amber light appropriately?
yupp, you're exactly right
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Old 02-08-2011, 01:00 PM   #13
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Quote:
Originally Posted by SickFinga View Post
I think he is talking about this type of test



Anyways, it sounds like a bad wire.
you are right this is the test i performed. I'm gonna follow wires.
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Old 02-08-2011, 10:35 PM   #14
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Broken wire. Look for the biggest convoluted mess of wire you can find, then find it's big brother, and dig in. My e36 had a couple broken wire (worn through!). Good luck, wiring is fun.
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Old 02-09-2011, 01:16 AM   #15
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Broken wire. Look for the biggest convoluted mess of wire you can find, then find it's big brother, and dig in. My e36 had a couple broken wire (worn through!). Good luck, wiring is fun.
thanks axxe, gonna do work in the morning
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