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Added Gas, Leaked From Dry Rotted Fitting, Replaced Hose Now Guage Broke?


Totem

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The title says it all. I replaced a chunk of gas line this weekend. Prior to replacing it the hose was dripping gas; it was the smaller or vent hose, not the huge one. I replaced it and when i did about a half gallon spilled out of the old one. I know for a fact the fuel gauge was working perfectly because i checked the fuel bringing it out of storage, added fuel (maybe a bit too much as i filled it by hand can.) it filled right up to the nozzle and thats when i noticed the leak. replaced the hose, and took it for a spin... The gauge is now so far below empty its like 1 centimeter below empty. Anyone ever see this? will it fix itself?

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the title says it all. I replaced a chunk of gas line this weekend. Prior to replacing it the hose was dripping gas; it was the smaller or vent hose, not the huge one. I replaced it and when i did about a half gallon spilled out of the old one. I know for a fact the fuel gauge was working perfectly because i checked the fuel bringing it out of storage, added fuel (maybe a bit too much as i filled it by hand can.) it filled right up to the nozzle and that's when i noticed the leak. replaced the hose, and took it for a spin... The gauge is now so far below empty its like 1 centimeter below empty. Anyone ever see this? will it fix itself?

I've had to fix a lot of 70s-80s Toyota trucks with malfunctioning gas gauges. None that I had to fix had any issues with anything in the dashboard. It was always the sending unit in the gas tank of the plug-on connector near the rear-frame. An "empty" reading means high-resistance. A bad connection at the rear harness can cause that. 110 ohms of resistance gives an "empty" reading and 2 ohms (almost full continuity) gives a "full" reading. You might of jarred the harness connector loose when working on the fuel hose.

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One other point. A normally working sending until only goes to 110 ohms to give an "empty" reading. If more resistance is added - like having the harness unhooked - or losing connection to ground - the gauge will go even below "empty."

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Update : well I jiggled it reached up around the tank and tried making sure the wires were good but the thing is cooked. Gauge remains way low and interestingly the battery drops to 11.9 when running from 12.6 resting while the isolated coach battery charges normally. JDE do you have a part number for the fuel sender for an 85 EFI?

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Part # is 8332039465.

Too bad the Geo Tracker sending units are no longer around cheap. Amazon had a bunch of them for $30 each and they fit the Toyota perfect. But - no more deals around that I'm seeing.

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Thank you for the number and it should help others, but I have gotten very lucky. I was just about to drive it to a local garage with a lift when i noticed that the turn signals were not working either. I immediately shut down the rig, check the master 15 amp kick panel fuse; it was blown and probably from when I re-installed the battery for the spring. As soon as I did the fuel gauge came back to life the battery started charging, signals worked etc.

I am not sure why that fuse blew or for that matter why the truck runs charging through a kick panel 15 amp fuse but in any event it was an easy fix. Come to think of it when i check the glove box i found a box of 15 amp fuses... I myself have been here before, and bought extra ones probably for that same problem......my memory just is not what it used to be.

Great info though and thanks for you help!

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