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Old 07-15-2003, 02:53 AM   #1
atmosphere
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Join Date: May 2003
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Location: San Diego
Vehicle:
98 Impreza 2.5 RS

Question Faulty gas guage?

I was on the freeway the other day and and all of a sudden my gas guage just starts dropping from a little more than half tank to below the empty line. After it reached the bottom it stay there for a minute the rasied to about quarter tank then back to bottom. When i pulled off and was sitting a stop light it slowly began to rise again. I wasnt on any hills or accelerating or decelerating, just maintaing the same speed. Any ideas as to what this is? bad guage, wires, fuse...?
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Last edited by atmosphere; 07-15-2003 at 10:42 PM.
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Old 07-15-2003, 10:41 PM   #2
atmosphere
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no one has suggestions?
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Old 07-15-2003, 11:31 PM   #3
wrxw03
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2003 Wrx Wagon
Silver

Default wack gas gauge???

typically the tank will pressurize that will cause the reading to drop & rise, but not below the empty. The fuel in the tank expands and contacts with temperature ( just like H.S. Science) but there is no way it should drop to below empty and back up to 1/4 a tank...

It could be many things, if it happens repeatedly its probably the sensor in the tank, if its a 1 time thing it could just be the resitance in the wires due to the heat.

But there only ideas,

mike
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Old 07-16-2003, 05:08 PM   #4
atmosphere
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anyone else care to comment? had this problem before?
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Old 07-16-2003, 06:50 PM   #5
MissingMyRS
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NOT YELLOW!!!

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Just of out curiosity.. what was the outside temperature like when this was happening?

My last Subaru was a '00 2.5RS, that would occasionally do exactly same thing (along with the low gas light when it dropped below 'e'), but only when it was hot (100 or over) outside.

I wish I could help you track down the source of the problem, but the dealer couldn't track it down, aside from saying it was electrical (duh) in nature, and shortly thereafter, the car was wrecked.

Good luck.
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Old 07-17-2003, 01:25 AM   #6
atmosphere
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It was rather hot that day somewhere in the high 80's to low 90's, may have been even hotter.
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Old 07-18-2003, 06:37 PM   #7
CRS_Unknown
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Never thought i would see it without digging deep with searches but, the exact same thing just happened to me. It was a week ago on family vacation during a long highway run across Indiana and Illinois en-route to St. Louis. The weather was very hot, in the low 90's, so I would say that may be the common thread. BTW, the car is a 2000, outback, 2.5L.
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Old 07-19-2003, 12:17 AM   #8
tbd
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Default same here

same thing happened to me just the other week. was an especially hot day in an inland city. saw it again today on an over cast day. happened on a hot and cool day. no answers here.
tony

http://forums.nasioc.com/forums/show...ght=fuel+gauge

i'm gonna try this

Last edited by tbd; 07-19-2003 at 12:28 AM.
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Old 07-24-2003, 08:55 PM   #9
SJwrx
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multi

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All I can say is:
Welcome to the club...

Rich
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Old 07-25-2003, 12:51 PM   #10
OBS Fan
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Same things happens on 97 OBS. It's the sensor inside the tank. Only happens during hot weather, as noted above. My fix? Keep track of mileage with trip odometer during summer months, fill up every 300 - 350 miles. If you're in a hot climate, it's probably a more serious/annoying issue.

-OBS Fan
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Old 07-26-2003, 09:47 PM   #11
mike270
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my dads 2000 Legacy started doing this lately as the temps have started to climb....maybe this is a common issue among 2000 subarus since many of the posters in this thread had 2000 models?
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