Question about 1991 Ford Ranger Supercab

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Second hand truck, no owners manual - gas tank size?

Second hand truck, no owners manual - gas gauge doesnt work, i am trying to find out what size gas tank it has, its the smallest motor, (2.3 litre?) manual transmission

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I'm assuming you want to know the tank size to avoid running out of gas. You don't need to know capacity to do this. When you run out of fuel, generally there is from one to two gallons remaining in the tank. You can't use that because when spread over the tank, the level is not high enough for the pickup to reach it (made this way so any water and junk in the tank is less of an issue) Therefore is you had for example a 14 gal tank, you would run out of usable fuel after using 12 gallons.
What to do: assume that you have a twelve gallon tank (disregard the true capacity). Fill the tank and figure out what your mpg is by keeping track of miles driven, then re-fill the tank. (divide miles driven by amount of fuel needed to re-fill...100miles divided by 10 gallons= should be getting way better than that though) So, lets say you are getting 18mpg...then you can go 180 miles on the same 10 gallons. The numbers will never be perfect as mpg varies with where and how you drive and even weather conditions.. .therefore the extra fuel you are ignoring will allow for mistakes. Also, about every fourth time you fill up, abandon your numbers and start process over again otherwise bit by bit you will use up the "reserve". Some people just carry around a gallon of fuel with them...That is a bit dangerous, and, running out of fuel with an electric pump can damage it from overheating (pump needs fuel around it to keep it cool)
The best thing you can do is to fix the gauge problem but this method will help you stay out of trouble 'till you do!!!.

Posted on Jul 14, 2009

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This truck should have an 18 g tank. It is not likely to have been changed.

Posted on Jul 14, 2009


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If you remove the sending unit in the gas tank, move it manually by hand as u saw done earlier, the gauge on the dash should also move. As long as the sending unit in the tank isn't 'stuck' at the half full level, the gauge should register empty to full as it moves. To be honest, I'm not sure if I would bother taking the sending unit out. 1st, u must be very careful not to blow yourself up when working on the gas tank (no sparks, etc), all u really need to do is fill up your car, see how many miles a tank of gas will go (carry a can of gas with u to see how many miles before u run out). If it's 350 miles, just set the trip gauge to zero every time u fill up, and get gas every 300 miles so u don't run out. If the sending unit moves freely, everything (wiring ) is connected properly, then it probably is the fuel gauge. good luck!

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