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Old 09-24-2006, 05:22 AM   #1
RX Renesis
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Default fuel gauge screwy?

this is not the first time i've noticed this, it has happened a few time already... what happens is, when ever i fill up a full tank of gas, and start to drive off, the fuel needle is never at the max point!? it takes a few start ups and turn offs for it to read max out... i'm sure the fuel tank is at full cause evey time i when i fill up i try to top off my tank and make an even number... this kind of makes me concer when i'm low on fuel... what if i near empty and the needle s still 1 bar from empty!? scary...
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Old 09-24-2006, 05:53 AM   #2
rs_two_five
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generally if your having a fuel level issue, its not the indicator (gauge) its 98.9% of the time the master fuel level sender in the tank. The one thats attached to the same arm as the fuel pump. Unfortunately that part is generally very expensive to buy, so you may want to try and clean with a light emery cloth (gently) the pickups on the unit itself. If that doesn't work.. then.. replace it.

One way to test it, is to measure the resistance of the unit, and see if the readings move smoothly from 0-35ish ohms.. unfortunately it involves removing it from the tank, and I'd much rather replace if i'm going to that much effort to test.

hope this helps, Sean-
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Old 09-24-2006, 10:44 AM   #3
Picard
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Try some fuel system cleaner in your tank before you start replacing things. It's always worked for me in my other cars.
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Old 09-24-2006, 12:38 PM   #4
shawmacs
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It's usually a better idea to ensure that your tank is topped off and then pay attention to the number of kilometres on the tank. Way more accurate than estimating from the fuel guage. Maybe that is just the pilot in me talking (fuel guages never seem to work well in airplanes, go figure)
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Old 09-24-2006, 01:48 PM   #5
semaj
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rs_two_five & Picard...he's got an '06 STi! Should he really be taking the fuel sender unit out and sanding it, or using fuel system cleaners??? How about the dealership for the warranty you paid for?

Might have to take off that TBE first though
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Old 09-24-2006, 02:03 PM   #6
shawmacs
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^^ I concur; a TBE will definitely impact the proper operation of the fuel level sender. Subaru research indicates they are sensitive to loud noise. No warranty for you!
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Old 09-24-2006, 02:56 PM   #7
semaj
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Quote:
Originally Posted by shawmacs View Post
^^ I concur; a TBE will definitely impact the proper operation of the fuel level sender. Subaru research indicates they are sensitive to loud noise. No warranty for you!
haha, I didn't mean the TBE will ruin the fuel gauge...just the dealer might give you a hard time about mods, that's all. Fine, leave the TBE on...and go to the dealer to get your fuel gauge looked at.
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Old 09-24-2006, 03:52 PM   #8
RX Renesis
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well so far i went to the dealer twice for service and they seem fine with it... and i've see other STis there with mods on and they seem fine with it...
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Old 09-24-2006, 03:58 PM   #9
semaj
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Quote:
Originally Posted by RX Renesis View Post
well so far i went to the dealer twice for service and they seem fine with it... and i've see other STis there with mods on and they seem fine with it...
Ok then, get them to take a look at your fuel gauge then!
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Old 09-24-2006, 08:46 PM   #10
rageguy
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Quote:
Originally Posted by RX Renesis View Post
well so far i went to the dealer twice for service and they seem fine with it... and i've see other STis there with mods on and they seem fine with it...
service and warranty are different. you can drive a heavily modded subaru to the dealership for a basic service/maintenance and they wont bug you about it, because you are paying for it.

but with warranty, some dealership will try to blame the problem on your modifications, to avoid doing the warranty work for free.

good luck rice renesis!
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Old 09-24-2006, 11:11 PM   #11
ghostfoot7
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Quote:
Originally Posted by shawmacs View Post
It's usually a better idea to ensure that your tank is topped off and then pay attention to the number of kilometres on the tank. Way more accurate than estimating from the fuel guage. Maybe that is just the pilot in me talking (fuel guages never seem to work well in airplanes, go figure)
wow.. that is a very disconcerting piece of knowledge!!!
How much fuel we got left? Well it says quarter tank so we could be empty.....
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Old 09-24-2006, 11:12 PM   #12
semaj
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good luck rice renesis!
oooh, I hope you are a friend of his
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Old 09-24-2006, 11:42 PM   #13
rs_two_five
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Quote:
Originally Posted by SubieDrift View Post
rs_two_five & Picard...he's got an '06 STi! Should he really be taking the fuel sender unit out and sanding it, or using fuel system cleaners??? How about the dealership for the warranty you paid for?

Might have to take off that TBE first though
oh shiznach.. yeah posted that when i was a little tired.. but i agree.. take it to the dealer being as though its soo new.
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Old 09-25-2006, 12:16 AM   #14
RX Renesis
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oooh, I hope you are a friend of his
i have no idea who he is... i think he wants a beatting...
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Old 09-25-2006, 01:04 AM   #15
semaj
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i have no idea who he is... i think he wants a beatting...
Hehe, now you're sounding like Dalton!
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Old 09-25-2006, 01:09 AM   #16
shawmacs
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Dalton with his poor speelang?
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Old 09-25-2006, 01:12 AM   #17
semaj
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Dalton with his poor speelang?
He can't help it...he's ESL
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Old 09-25-2006, 02:02 AM   #18
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im not having that kind of problem on mineyour best bet is take it to the dealer and get it check.
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Old 09-25-2006, 02:35 AM   #19
banman
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The way I'm interpreting his "problem", it sounds totally normal. It usually takes a while for the fuel gauge to fully max out (i.e. go above "F"). I'm not sure this is something he should be worried about, unless his gauge is reading 1/2 or 3/4 when he has a full tank.
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Old 09-25-2006, 03:29 AM   #20
RX Renesis
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Quote:
Originally Posted by banman View Post
The way I'm interpreting his "problem", it sounds totally normal. It usually takes a while for the fuel gauge to fully max out (i.e. go above "F"). I'm not sure this is something he should be worried about, unless his gauge is reading 1/2 or 3/4 when he has a full tank.
well ever since day 1, everytime i fill up my tank to the max the gauge reads max right after i start it up, but lately(the past 3 times i've filled up) it doesn't max out anymore right when i start it up... it takes a few start ups to get it maxed out... so i dono if it's normal or something is acting up...
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Old 09-25-2006, 03:34 AM   #21
rageguy
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honestly, just take your car to the dealership and ask, they shouldnt blame it on the exhaust you have. its your best option. you've had the problem since a while ago...2 weeks i think? time to get it checked out =p

no i dont know rx =p

Last edited by rageguy; 09-25-2006 at 03:46 AM.
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Old 09-25-2006, 02:06 PM   #22
FunkMasta
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dealer ftw! my TS used to take about 30 seconds to reach full. but it got there.
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