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Old 11-14-2008, 03:08 PM   #1
blastedM3
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Cluster Problem...Anyone?

All right, so last i got home from work around 5 and parked my car.Everything was working fine till 9 in the morning today when i went to start it and i check to see the GAS GAUGE is not working.

Here is the funny part.It acts funny it goes up and down and it flickers as i rev my car a bit. Sometimes it will work for like 20 secondas and than stop working again.

I opened the cluster and checked all the connectors in the back and still not working properly.

Can anyone tell me whats going on here. I'm buying LUNCH to anyone that can help me fix this problem

Do i need another cluster or something?

Any help is appreciated.

thanks
sami
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Old 11-14-2008, 03:19 PM   #2
SamE30e
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SI board batteries...

Orrrrr

Fuel sender
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Old 11-14-2008, 03:21 PM   #3
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.. or check your fuses.
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Old 11-14-2008, 03:35 PM   #4
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Quote:
Originally Posted by SamE30e View Post
SI board batteries...

Orrrrr

Fuel sender
Where is the SI board and where is the fuel sender?I have no idea where these are?

Quote:
Originally Posted by Blades View Post
.. or check your fuses.
All my fuses seem to be ok.

Its just the fuel gauge thats not working.Everything else is working fine.
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Old 11-14-2008, 05:46 PM   #5
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Sender is under the rear seat on the passenger side, and the SI board is inside the cluster.
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Old 11-14-2008, 07:29 PM   #6
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Also, there is a little brass nut on the back of the gauge, (rear of the cluster). Make sure this nut is clean, and tight. It is for ground, and can cause a jumpy gauge.

Might as well check the temp gauge while it's out, same deal.
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Old 11-14-2008, 10:29 PM   #7
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Quote:
Originally Posted by e30jones View Post
Also, there is a little brass nut on the back of the gauge, (rear of the cluster). Make sure this nut is clean, and tight. It is for ground, and can cause a jumpy gauge.

Might as well check the temp gauge while it's out, same deal.
what!?
i never knew that

MAYBE THATS WHY MY RPM DOESNT WORK ooooo ill be so angry if that is the case
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Old 11-14-2008, 11:14 PM   #8
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the sender is working....i hear it running and thats what the problem was about a month ago when my car didint start. But now it works good.

As for the ground nut ill check that out tomorrow and see if thats what causes the problem.

thanks for the help guys......
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Old 11-15-2008, 01:01 AM   #9
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Thats not the sender, thats the fuel pump.
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Old 11-15-2008, 01:15 AM   #10
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Sender unit is a floating plastic knob on a bar that slides up and down in the fuel. A sensor sends a signal to the ECU telling how high / low the level is. I believe the ECU 'buffers' that signal so the gauge doesn't wobble all over the place. This buffering means that the gauge probably wouldn't "flicker" up and down if it was the sender unit.

I think +1 for the brass grounding nut on the back of the cluster. If SI batteries were the case, then the temp gauge would go fritzy too.

Next time it acts up, gently pound like a monkey on the dash over the gauge. If it responds to your pounding by flickering / correcting, then its probably the ground. Remove the cluster (5 mins, no steering wheel removal necessary) pull the back off on your kitchen table, find that brass nut, clean it and polish it with some emery paper and presto.
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Old 11-15-2008, 11:55 AM   #11
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I think +1 for the brass grounding nut on the back of the cluster.
+2

Take the cluster apart pull the gas and temp gauges off the board and apply new solder to the pad where the grounding nut tightens down on.
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Old 11-15-2008, 12:06 PM   #12
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i haven't had a working gas gauge since i got my car last year. I go by an avg of 10km/L If i put in 20L i have an avg of around 200km. Good thing my low fuel light works.. when that goes on i have about 60km before i really need gas.

I had my mechanic take a look at the issue when i had to get my tank replaced. they even replaced the floater.. so i tlooks like the cluster needs to be cleaned.

and the batteries too? anyone know what kind of batteries they are so i can get them ahead of time?
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Old 11-15-2008, 12:11 PM   #13
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They're ni-cad AA batteries, soldered to the board. You can get a two AA holder and solder its wires to the board to make it easier. Its best to pull it apart and see what you're comfortable with doing.
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Old 11-15-2008, 12:15 PM   #14
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^^^^ thanks for the info

I'll give that AA holder a go. When i do it i'll post some pics
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Old 11-15-2008, 01:52 PM   #15
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So i opened my cluster and cant seem to find the batteries......I checked the ground nut it seems to be nice and tight and the fuel sender seem to be working fine cause when i checked the sender and emptied it out my low fuel light came on. That should be a sign that it works...if i'm not mistaken.

here is some pics...if someone can point out the batteries for me
Attached Images
File Type: jpg 1.JPG (73.0 KB, 47 views)
File Type: jpg 2.JPG (58.7 KB, 47 views)
File Type: jpg 3.JPG (58.6 KB, 48 views)
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