| [ Total Views: 2489 | Total Replies: 9 | Thread Id: 101856 ] |
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 Kent
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| posted on May 2nd, 2013 at 06:37 PM |
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Fuel Level reads wrong?
when I brought the car the level was inaccurate, so I put a new sender unit and still reads inaccurately.
does anyone know of this problem or have any idea as to what the issue could be ?
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bitemeoz
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| posted on May 2nd, 2013 at 08:16 PM |
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I have read somewhere if you have a wrong reading it could be too much or too little voltage going from the sender. That's all I remember.
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 matberry
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| posted on May 2nd, 2013 at 08:22 PM |
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there's a few different models, need more details
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
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nils
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| posted on May 3rd, 2013 at 11:06 AM |
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a little hard to explain, but (failing your earth being dirty) there are 2 resistors inside your gauge if you open it up. One on either side of the
coil responsible for movement of the needle, these two resistor set the calibration of the gauge.
Measure the resistance of the these and see wether they come up to spec compared to the coloured bands printed on them, if not go down to jaycar and
buy some replacements and solder them in, usually costs about a dollar to recondition a gauge 
Will try and chase down a basic diagram, remember these are very simple machines
Quit calling rust patina
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Kent
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| posted on May 7th, 2013 at 05:25 PM |
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| Quote: | Originally
posted by nils
a little hard to explain, but (failing your earth being dirty) there are 2 resistors inside your gauge if you open it up. One on either side of the
coil responsible for movement of the needle, these two resistor set the calibration of the gauge.
Measure the resistance of the these and see wether they come up to spec compared to the coloured bands printed on them, if not go down to jaycar and
buy some replacements and solder them in, usually costs about a dollar to recondition a gauge
Will try and chase down a basic diagram, remember these are very simple machines
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is there any way to test these resisters with out pulling out the gauge? I am horrible with electrical work !
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ragged
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| posted on May 7th, 2013 at 09:53 PM |
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How do you know it is inaccurate??? What are your symptoms? Many old and new cars are inaccurate, i.e. reads full for the first half a tank before the
gauge moves.
Dave
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nils
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| posted on May 8th, 2013 at 04:30 PM |
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| Quote: | Originally
posted by Kent
| Quote: | Originally
posted by nils
a little hard to explain, but (failing your earth being dirty) there are 2 resistors inside your gauge if you open it up. One on either side of the
coil responsible for movement of the needle, these two resistor set the calibration of the gamachines
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is there any way to test these resisters with out pulling out the gauge? I am horrible with electrical work !
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Afraid not kent 
Quit calling rust patina
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Joel
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| posted on May 8th, 2013 at 09:12 PM |
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As Ragged says, what's your gauge doing that makes you say its not accurate?
Mine used to only go to 3/4 when full and tank was bone dry half way through reserve, another sender and it still behaved exactly the same.
I ran a new ground to the sender and it now goes all the way to full and at the start of reserve I still have 5L left which is spot on.
Moral to the story, check the sender ground.
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matberry
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| posted on May 8th, 2013 at 10:43 PM |
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^^ yep, also the voltage stabilizer earth can effect the readings. what exactly is it doing?
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
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Kent
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| posted on July 30th, 2013 at 09:47 PM |
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Straight after I will up it will stay at 3/4 for the majority of the tank, then it will jump down to 1/4 and hang about there, the last quarter seems
to be accurate, I have replaced th sender unit but that didnt solve the problem
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