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Unread 02-04-2013, 08:02 AM   #16
JeeperDon
Patience, Grasshopper
 
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1993 YJ Wrangler 
 
Join Date: Jan 2005
Location: Albuquerque, NM
Posts: 6,634
I've been having this problem for years too, but finally fixed it a few months ago. I don't necessarily recommend this procedure, was not the easiest, but I like it.
I suspected the problem was in the tank, not the dash, and this got confirmed when I swapped the whole dash for a custom and used a new Autometer gauge. I also know that it's a pain to drop the tank all the time to slightly bend the float arm while trying to get the numbers right. So, I made a nicely done access panel in the floor of the rear bed of the tub. Over about 3-4 tanks of gas and minor adjustments to the float via the new access panel, I'm good. As a start, I used a potentiometer (variable resistor, from signal line at tank to ground) so I knew exactly what ohms were needed to get the gauge to read at the 5 main points (E/.25/.50/.75/F), then played with the float assembly on the bench to get those ohm readings close. The gauge now reads dead on 'E' when I have 3 gallons left, and takes 17+ to fill. It's not dead on linear at the mid points, but it's decent.
0
So, I can tell you that enough playing with bending the float can make it work.

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'93 YJ, '02 GM 4.3 Vortec V6, SOA, dual ARB's, 8.8+D30(w/WarnHubs), 4.88 gears, 35" BFG KM2's, AX15, 15x7 wheels, NP231+4:1+SYE+2LO, York OBA, Warn M8000, no top or doors Apr-Oct.
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Unread 02-05-2013, 02:58 PM   #17
rockywrangler
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1989 YJ Wrangler 
 
Join Date: Feb 2013
Location: westminster, Colorado
Posts: 7
Quote:
Originally Posted by bluedeval03 View Post
Rocky, I can tell you, because mine kept doing the exact same thing, that the filter sock on the bottom of the sending unit has come off. I have a '90 and the fuel pump has been replaced 4 times now. This last time I pressed the metal tabs that hold the sock on for a tighter fit, and I also used a couple of zip ties to make sure it doesn't fall off again.



ya know now that i think about it mine didn't have a filter sock on it when i pulled it
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Unread 02-05-2013, 03:07 PM   #18
rockywrangler
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1989 YJ Wrangler 
 
Join Date: Feb 2013
Location: westminster, Colorado
Posts: 7
Quote:
Originally Posted by Northinger View Post
Here is some specs, hopefully you can read it.
NORTHINGER...THANKS

that helped out alot i can read the first one and that one made the difference. I had already checked resistance(ohm) in sending unit and it reads 1.0 to 94.5 .... obviously empty to full

so that solved it i have got to have an open to ground....
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Unread 02-05-2013, 06:35 PM   #19
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 15,656
The ground is shared with the fuel pump. If the ground was bad the fuel pump wouldn't work. That is the full range of the sender unit. It sounds good not bad.
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Unread 02-05-2013, 09:06 PM   #20
rockywrangler
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1989 YJ Wrangler 
 
Join Date: Feb 2013
Location: westminster, Colorado
Posts: 7
ahhh man why did i have to know that... thanks though...... i had my hopes up, pointed to it guess it is off to the dash and start checkin there
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fuel gauge , fuel level sensor , fuel pump assembly , fuel tank

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