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85 f150 gas gage not working

 
Old 01-06-2019, 08:08 PM
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Default 85 f150 gas gage not working

I haven't tried to locate the problem yet. For the past few months it was saying full when really its at half tank and when it was really empty it said half but as of today it just shows empty and not even moving.
I'm thinking the sensor is in the tank and the tank has to be dropped to replace?
As I said I have not started my research yet. I posted here first.
Thanks!
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Old 01-12-2019, 09:06 PM
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Your other gauges working?

1 or 2 Tanks ?

Last edited by vjsimone; 01-12-2019 at 09:45 PM.
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Old 01-14-2019, 10:45 PM
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Everything else is working ok. only a single tank.
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Old 01-21-2019, 06:43 PM
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Originally Posted by 85_Ford_Junky View Post
Everything else is working ok. only a single tank.
Chances are it is your sending unit in the tank....
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Old 01-24-2019, 10:21 PM
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Originally Posted by vjsimone View Post
Chances are it is your sending unit in the tank....
Thought as much. when I get time I'll look into it.
Do I have to use the original part? I'll try to look for what's available
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Old 01-25-2019, 05:56 AM
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Does your gauge swing up beyond full to it mechanical limit?. The sender is just a variable resistor. I have a sender in my truck which has a dead spot between 3/4- 7/8. The gauge will swing up and peg out beyond full when I get to this spot. Go either side of tank volume, the gauge works perfectly. If that's your case, you will have to drop the tank. On a 85, you might want to locate a replacement first before dropping the tank. The sender may have been long discontinued.
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Old 01-25-2019, 10:17 AM
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Originally Posted by 85_Ford_Junky View Post
Thought as much. when I get time I'll look into it.
Do I have to use the original part? I'll try to look for what's available
You can always try your local auto parts, but I would remove the original to take with you.
Also, you may be able to extract the part number off the one you have;

http://www.lmctruck.com/icatalog/fd/full.aspx?Page=42
LMC Truck: This could be the one;
43-4042 SENDING UNIT-SINGLE LINE $69.95

Is your calibration sticker still visible on your engine or truck?
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Old 01-26-2019, 07:56 PM
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Old 02-01-2019, 09:32 PM
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Thanks!!
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