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92 Ranger gas gauge is not accurate. The sending unit & gauge were replaced.

Discussion in 'Ford Ranger - Mazda B-Series Forum' started by arionne, February 7, 2009.

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    1. arionne

      arionne New Member

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      I can't get my gas needle to work on a 1992 ford ranger, I have tried everything,a new fuel pump and sending unit,I have changed the instrument cluster and the same thing is happening,when I fill up the needle goes to a 1/2 of tank and when it is empty it only goes to a 1/4 of a tank,I know this because I have ran out of gas before.All the other gauges on the cluster are working fine that is why I am confused, please help any info will greatly be appreciated. Thanks
       
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    3. Sams01XplrSprt

      Sams01XplrSprt Southern Cali Explorer Elite Explorer

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      welcome
       
    4. BrooklynBay

      BrooklynBay Staff Member Moderator Elite Explorer

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    5. Cleveburg

      Cleveburg New Member

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      This is just a wild guess, but check the anti-slosh circuit. This is a little card, about the size of a matchbook, that plugs somewhere into the back of the instrument cluster. It may be bad or possibly not making a good connection. First thing to try is unplugging it and cleaning the contacts then re-seating it.

      If you had to replace it, I'm not sure where to buy a new one, but a junkyard instrument cluster would have one. as far as I know, the same circuit was used for several years in the 90s.

      If you have changed it- you did say that you changed the instrument cluster- then I would look for some anomaly in the wiring somewhere- dirty connector pin or bad ground. Most of the time it's something really simple and dumb.
       
    6. arionne

      arionne New Member

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      They always say if you want somthing right you gotta do it yourself. I droped the tank and come to find out the guy who had changed the fuel pump and sending unit installed the wrong one,when I took it out of the tank it was all bent up,I gave it a test and still nothing,I went out and bought a new one tested it and everything checked out fine, I will install it myself tomorrow and let you guys know what happen.
       
    7. Tbars4

      Tbars4 Offroad/Fitness Moderator Staff Member Moderator Elite Explorer

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      ...I just seen this...Was it a shop that installed this???...That's why most of us do our own work...
       
    8. arionne

      arionne New Member

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      I usually do my own work but I needed the truck badly and did not have time to ,now I wish I would have just waited, at least I would have some extra cash in my pocket.
       
    9. BrooklynBay

      BrooklynBay Staff Member Moderator Elite Explorer

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    10. arionne

      arionne New Member

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      No it's still not working,I installed the new fuel pump and sending unit today and still the same thing:mad:.I really don't know whats going on now.If anybody have any idea please please let me know.Thanks.
       
    11. BrooklynBay

      BrooklynBay Staff Member Moderator Elite Explorer

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    12. arionne

      arionne New Member

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      :ttiwwp:They are telling me somthing about a part in the cluster called the anti-slosh module.Have anyone ever heard of such a part?
       
    13. Tbars4

      Tbars4 Offroad/Fitness Moderator Staff Member Moderator Elite Explorer

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      ...Read post #4...:D

      ...Sorry, no pics...:(
       
    14. Cleveburg

      Cleveburg New Member

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      The anti-slosh module is a (aprox) 2"x2" circuit board that is plugged into the back of the instrument cluster. It is connected between the fuel level sensor in the tank and the fuel gauge. It averages out the signal coming from the sensor that varies as the fuel sloshes, enabling the meter to give a steady reading. This module is present on 94 and prior, it may be on later models but I don't know for sure. I don't have a photo.
       
    15. arionne

      arionne New Member

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      Sorry about the icon that was a mistake.I went to a local salvage yard and pulled about 5 anti-slosh modules out of some trucks, tried all of them but still the same thing.Help.
       
    16. Cleveburg

      Cleveburg New Member

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      There really isn't much that the problem can be. Go to this post and download the document:

      INSTRUMENT CLUSTER SWAP

      On page 8 is the fuel gauge. Note that the diagrams are for a 93, but a 92 is electrically the same, just the connector numbers have changed. Study that, do some troubleshooting, then come on back.
       
    17. robbieo11

      robbieo11 Active Member

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      ok all hold out on the torches and welders just a second
      There are 2 things needed for this gauge to work correctly
      1. power do we have power going out to the tank??
      2. ground is there a good ground

      just because it runs does not mean we have both at the tank it is it own circuit
      if i remember correctly you can use an Ohm meter to do this from the tank all the way to the dash
       
    18. Cleveburg

      Cleveburg New Member

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      The fuel level sensor in the tank is a simple variable resistor. 145Ω full, 22Ω empty. The current for the sensor is sourced through the slosh circuit. The other side of the sensor is grounded. If that ground is bad, there won't be a good reading.



      The Yellow/White wire (C251/Pin 5) is the connection to the sensor. Connect an ohmmeter there and rock the truck and watch the resistance bounce up and down as the fuel sloshes. If it doesn't vary, or if it is more than 145Ω with a full tank, then there's something wrong with either the wire to the tank, the sensor, or the ground at the sensor.
       
    19. omagasohe

      omagasohe New Member

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      Thank you..

      Just bought a 91 ranger 2 days ago, and found out it has an intermittent fault in the fuel gauge. Just wanted to thank all of you for the helpful info.
       
    20. rowena57

      rowena57 New Member

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      I'm looking at buying a '92 ranger that has a similar problem. The current owner says that when you fill up tank the gauge reads over the full mark, and that when the gauge says 1/2 tank you better get fuel fast or you will be at the side of the road.

      I'm female and don't know a lot about mechanics but want to work on anything I can. I've had work done in shops that caused more problems than they fixed.
      Dad made us learn a lot before we could drive and back in the '70's and early '80's I did my own tune-ups and oil changes.

      I'm glad I found this site. My husband uses a diesel forum and it's helped him a lot. MPG is 25-28 on his F250 and that's combined. Towing only drops it 5-8 MPG.

      Hope you guys (and gals) can help this newbie out. SS for the long post.
      Thanks.
       
    21. Cleveburg

      Cleveburg New Member

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      Here is the wiring diagram for a 92:

      http://users.isp.com/vmstep/stuff/92%20ranger%20instrument%20cluster%20wiring%20diagrams.pdf

      The gas gauge is right on the first page.

      The actual troubleshooting shouldn't be all that difficult, the issue is getting to all the connectors. It would help to pull the instrument cluster as that is the only way to get to and isolate the transducer and gauge wires.
       
    22. rowena57

      rowena57 New Member

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      Thanks Cleveburg for the diagram. Right now it looks greek to me but have a place to start now. This with the other comments and suggestions help a lot. Thanks again.
       
    23. Cleveburg

      Cleveburg New Member

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    24. tmwalsh

      tmwalsh Member

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      Cleveburg was the name we used to call the mistake-by-the-lake back when I was at NavFinCen. I guess it must still there, no?
      One thing that no one has mentioned is testing the sending unit when you go to install it. Nor grounding the wire from the gauge where it would attach to the sending unit. You can connect the sending unit, and move the float from either end of its travel to check the functioning of the gauge before installing it into the tank. You can also check the voltage to the gauge and connectivity to the wires under the bed on the top of the tank by grounding the sending unit wire to see the gauge travel fully in one direction.

      tom
       
    25. casperthealien

      casperthealien New Member

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      Just so you happen to know I have talked to a Ford Tech and he has mentioned it is not the gage issue is it the (AntiSlosh-Module) that is behind the instrument cluster.
      Try finding a used one and replacing it.
      and to let you know as long as it comes from a ranger even if it is new then yours it will still work most of the fords Anti-Slosh Modules as all pretty well the same thing!!
       
    26. casperthealien

      casperthealien New Member

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      Yes there is an Anti Slosh Module on the back side of the instrument cluster it look alot like a little computer circuit board.
      Iy has one plastic clip to hold it into the sliders slots.
      And there is 5 metal little clips that connect to the circuit board of the instrument cluster!
      to purchase a new module from Ford it is $191.00 Canadian and to get a good used one from auto wreckers could cost 10.00
      you need to weigh the pros and cons. I will upload a picture of the recent module i replaced as well.
      [​IMG][/URL][/IMG]
      [​IMG]
       
      Last edited: September 3, 2011

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