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gas gauge not working

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Old 08-21-2009, 07:50 AM   #1
sigmund
 
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Default gas gauge not working

I am new to the forum and did a search, but did not find anything related to gas gauges.

I bought my 90 GT 5 speed two weeks ago, and I am making it a rolling restoration. The gas gauge was not working when I bought it, and I would like to know where to start with the diagnosis and repair. I am hoping it is an easy fix, but it never has been for me.

Any ideas as to where to start and proceed?

Thanks in advance.

Sigmund
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Old 08-21-2009, 08:22 AM   #2
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The fuel sending unit is usually the most likely cause.
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Old 08-21-2009, 09:43 AM   #3
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Indeed. Or you'll get lucky like me and run the car out of gas completely and when you fill it up the gauge will be working again. O.o

But it's most likely your fuel level sending unit.
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Old 08-21-2009, 10:37 AM   #4
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Or the slosh sensor, located behind the gauge cluster. A square chip. this is what IM hearing...
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Old 08-21-2009, 11:03 AM   #5
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Default fuel level sending unit

Thanks for your responses. Pardon my ignorance, but I am assuming the fuel level sending unit is in the tank, and the tank must be removed to access it. Is that correct?

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Old 08-21-2009, 11:13 AM   #6
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^that is correct, its the innermost unit that goes into the tank from the top. Let us know your progress and if you fix it, what the culprit is. Im having the same prob, but I think its the slosh sensor.
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Old 08-21-2009, 12:15 PM   #7
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Quote:
Originally Posted by domindart View Post
^that is correct, its the innermost unit that goes into the tank from the top. Let us know your progress and if you fix it, what the culprit is. Im having the same prob, but I think its the slosh sensor.
Anti slosh module*

Not trying to be a condescending ***, just giving you the correct term for the part.
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Old 08-21-2009, 12:44 PM   #8
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cool thnk u
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Old 08-21-2009, 01:28 PM   #9
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I will post what the culprit was when I find it out. Thanks again.

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Old 08-22-2009, 01:19 AM   #10
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I have never heard of thise anti slosh sensor. O.o
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Old 08-22-2009, 02:27 AM   #11
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It is mounted on the back of your instrument cluster.
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Old 09-11-2009, 04:44 PM   #12
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Sorry it has taken so long to get back, but the problem has been solved. The sending unit was bad and needed replacing, but it did not fix the gas gauge. The anti-slosh module also needed replacing. I was told that the anti-slosh module will sometimes short out the sending unit in the tank when it goes bad. So, if your gas gauge is not working, I guess you can start with the anti-slosh module. But even if you replace it, your gauge still might not work because it shorted out the sending unit when it went bad.

Hope this helps.

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Old 09-11-2009, 07:08 PM   #13
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thanks for updating us sigmund, that really helps me. Where did you find a slosh module, I need to try to fix mine?
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Old 09-12-2009, 06:05 AM   #14
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It came from the Ford dealer. It is called an amplifier and has the part number MF E9SZ-10E849-A. It cost $94.04. The sender was $169.15. So, having a working gas gauge was not a cheap fix. Maybe someone else knows where the parts could be found cheaper.

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Old 09-12-2009, 07:41 AM   #15
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Sending Units
$134.99 Original Ford
http://www.latemodelrestoration.com/item/LRS-9275B
OR
$49.99 Reproduction
http://www.latemodelrestoration.com/item/LRS-9275BR
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Old 12-14-2009, 03:47 AM   #16
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Cool, I have the same problem. I heard there was a way to check the sending unit with a Volt/ohm meter without having to remove it from the vehicle. Not sure though.
I have this problem and this helps out alot!
I hope to work on it in the next couple of weeks!
Will keep U guys posted.
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Old 12-14-2009, 05:52 AM   #17
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Next time start your own thread. Please do not did up old ones. Good luck and welcome to the forums!
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Old 12-14-2009, 05:52 AM
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1990, 2005, 2009, 50, 87, 89, ford, fuel, gage, gas, gauge, guage, mustang, mustangs, shelby, working

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