Re: ebody fuel gage
[Re: aar1]
#1584568
02/26/14 11:08 PM
02/26/14 11:08 PM
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Joined: Jan 2003
Posts: 4,998
North Pole,New York
formula_s
master
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master
Joined: Jan 2003
Posts: 4,998
North Pole,New York
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Quote:
w Basically my tank is full..... but the needle does not get to the "F" on the gage.(sic)
I went through this myself. Only cure is to remove the sender from the tank and bend the arm holding the float allowing it more 'travel' so that the gauge sweeps up to the full mark. I did this trial and error with the sending unit/float assy on the floor, connected with 2 small wires, one to the terminal and the other to any surface on the assy to a ground on the car. I slowly moved the float arm up and down and watched the movement on the dash. What you want in the end result is that when the tank is full that the float is rising to the top of the tank so the gauge reads full. Of course you wont know for sure until you fill the car up with gas.!!!!  Like I said trial and error. My 70 'cuda doesn't have the round mufflers on the sides of the gas tank which made it easier to do.
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Re: ebody fuel gage
[Re: aar1]
#1584569
02/27/14 01:23 AM
02/27/14 01:23 AM
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Joined: Jun 2008
Posts: 1,822
Colorado
denfireguy
top fuel
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top fuel
Joined: Jun 2008
Posts: 1,822
Colorado
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Quote:
This is probaby a stupid question and I'm afraid I already know the answer but here goes. Is there any kind of adjustment for the fuel gage - a screw or something on the back side to help it sync up with the fuel sending unit. Basically my tank is full..... but the needle does not get to the "F" on the gage. Just looking for a simple fix without pulling the sending unit.
I know of several E bodies, including mine, that do the same thing. It is not the ground. I never went any further into it since I cared more that the empty indication is accurate.
Craig
2014 Ram 1500 Laramie, 73 Cuda
Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango
Only previous Non-Mopar: Schwinn Tornado
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Re: ebody fuel gage
[Re: aar1]
#1584571
02/27/14 01:44 AM
02/27/14 01:44 AM
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Joined: Nov 2007
Posts: 21,831
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,831
Kirkland, Washington
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Guys....think out of the box. Ditch the factory mechanical voltage regulator for the dash gauges. Go solid state. Google it...it's well known and cheap--you just gotta be good at fitting electrical components (resistor, wiring, and an SCR) in a tight space.
This upgrade eliminates the archaic 12-0-12-0 average to 5 volts factory system.
OK now take it a step further, I've got this on my fuel gauge circuit and you can too, google it. You separate the fuel sender circuit and create a solid state voltage regulator with a variable SCR (silicon controlled rectifier). This variability is a TINY screw head that allows you to feed the fuel gauge a full voltage from about 4 to 6.5 volts...........get it? You can then calibrate your system, BUT you can only move the needle reading up or down across the entire spectrum, you cannot broaden or narrow the spectrum of gauge travel.
Cool stuff
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Re: ebody fuel gage
[Re: Pacnorthcuda]
#1584572
02/27/14 12:50 PM
02/27/14 12:50 PM
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Joined: Jun 2008
Posts: 1,822
Colorado
denfireguy
top fuel
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top fuel
Joined: Jun 2008
Posts: 1,822
Colorado
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Quote:
Guys....think out of the box. Ditch the factory mechanical voltage regulator for the dash gauges. Go solid state. Google it...it's well known and cheap--you just gotta be good at fitting electrical components (resistor, wiring, and an SCR) in a tight space.
This upgrade eliminates the archaic 12-0-12-0 average to 5 volts factory system.
OK now take it a step further, I've got this on my fuel gauge circuit and you can too, google it. You separate the fuel sender circuit and create a solid state voltage regulator with a variable SCR (silicon controlled rectifier). This variability is a TINY screw head that allows you to feed the fuel gauge a full voltage from about 4 to 6.5 volts...........get it? You can then calibrate your system, BUT you can only move the needle reading up or down across the entire spectrum, you cannot broaden or narrow the spectrum of gauge travel.
Cool stuff
Already did the regulator replacement. Gauge reads the same as it always did (for 30 years now).
I was going to go with an op amp and a pass transistor to make it more linear. It would be easy to add a low fuel LED as well.
Craig
2014 Ram 1500 Laramie, 73 Cuda
Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango
Only previous Non-Mopar: Schwinn Tornado
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