86subaru Posted May 12, 2012 Share Posted May 12, 2012 my gauge is off , it works but off , thinking i read cleaning the fuel pump with a number 2 pencil? Quote Link to comment Share on other sites More sharing options...
mattocs Posted May 12, 2012 Share Posted May 12, 2012 Some people have had luck with adding some Techron or similar cleaner to their gas. By off, do you mean you hit E and still have 5 gallons left or that it goes from F to E in 100 miles or so? Quote Link to comment Share on other sites More sharing options...
86subaru Posted May 12, 2012 Author Share Posted May 12, 2012 already tried to add , fuel it up drive 125 miles reads quarter of tank Quote Link to comment Share on other sites More sharing options...
johnceggleston Posted May 12, 2012 Share Posted May 12, 2012 mine hits E around 200 miles and usually has 5- 6 gallons left. of course city is different than hiway. i just re-set my trip meter every time i fill up so i know. i know both how far i have gone and i know how many mpg i usually get. i have noticed the gauge reads more correctly if i do not stop the car. in other words, on long trips, i fill up before starting and drive for 200 plus miles the gauge more accurately reflects the fuel in the tank. once i stop for lunch or a bathroom, or at least by the time i complete my 300 mile trip to grandma's house, it goes back to its old ways, showing less than what is actually in the tank. i can't figure this one out. trip meter is your friend, that and the ''low fuel light''. (when mine comes on it takes about 14 gallons to fill up.) Quote Link to comment Share on other sites More sharing options...
heartless Posted May 13, 2012 Share Posted May 13, 2012 (edited) yup - mine did that sometimes fill it up, it would read full, and work ok to about 3/4 of a tank, then it would quit working completely, until it got down to 1/4 tank, then read fine until it got to empty... from what I have been able to find - this is because the secondary sending unit is going bad - the one on the drivers side of the tank. the primary is on the passenger side along with the fuel pump... in my case, i swapped mine out with another from a lower mileage car and it has been working fairly well since. and yes - the trip meter is a very useful tool (and my low fuel light doesnt work!) Edited May 13, 2012 by heartless Quote Link to comment Share on other sites More sharing options...
1-3-2-4 Posted May 13, 2012 Share Posted May 13, 2012 yup - mine did that sometimes fill it up, it would read full, and work ok to about 3/4 of a tank, then it would quit working completely, until it got down to 1/4 tank, then read fine until it got to empty... from what I have been able to find - this is because the secondary sending unit is going bad - the one on the drivers side of the tank. the primary is on the passenger side along with the fuel pump... in my case, i swapped mine out with another from a lower mileage car and it has been working fairly well since. and yes - the trip meter is a very useful tool (and my low fuel light doesnt work!) How far up in years can you go for a fuel sender? Quote Link to comment Share on other sites More sharing options...
heartless Posted May 14, 2012 Share Posted May 14, 2012 How far up in years can you go for a fuel sender? that I am not real sure of, the used one I put in came from a 91 model, my car is a 90. would need to do a little research on if/when the sending unit got changed. I believe, in my case, that they are the same at least thru 94 - but I could be wrong? ok, so a little poking around and nobody seems to list the secondary one for 90-94 models (lame), but they do list it for 95 & up, and it appears to be identical to what I have at least thru 1999. Hope that helps. Quote Link to comment Share on other sites More sharing options...
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