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geobj
 
  Fuel Gauge goes to Empty and Back? - Posted: 08-16-2007, 11:33 AM
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Post #1

While driving, and usually when its below half a tank, the fuel gauge drops to empty instantly. Of course this sets off the alarms and idiot lights and is annoying. Additionally, it seems to do this while sitting level and traveling uphill. Any thoughts?

1998 Dodge Ram Ext. Cab, 5.2 liter, 4x4

Last edited by geobj : 08-16-2007 at 09:17 PM.
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dargo21
 
 Posted: 08-16-2007, 11:55 AM
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Post #2

Mine does it too - I talked to my mechanic about it and he said it's most likely the sending unit in the tank that's going bad.
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Grantman31
 
 Posted: 08-16-2007, 01:02 PM
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Post #3

The mechanic told you it was going bad so he could charge you to replace it. Our tanks aren't measured by a pressure system, but simply a "bobber" like method to check levels. As you go up an incline, the tank is misread in volume because of the fuel being pooled to the far side of your tank, and that level at which the check engine light is initiated is breached.
When you level out, the reading goes back to normal as the fuel returns to a more evenly distributed surface area in the tank.
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Current Vehicle:
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Gone but not forgotten:
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Quote:
Originally Posted by BleedDodge
Why not just inject some fake oxygen into the pipes instead of getting fake sensors? Problem solved.
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dargo21
 
 Posted: 08-16-2007, 01:07 PM
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Post #4

Alas, in my case it does it sitting level on the ground, at idle. And I didn't even let him do it, that's just what he said was the likely cause.

Mine is an instant switch to empty - even when the fuel guage is reading full.
__________________
Personal Truck:
1998 Ram 1500 Black Single Cab
3.9L V6, 74,500 Miles
Completed Mods:
LED Brake Lights
ICOM IC-208H 2-Meter Radio
Gen I K&N 57 Series FIPK
Magnaflow Direct Fit Cat (Part #43285)
Planned Mods:
Interior LED Lighting
Line-X Bedliner

Work Truck:
2005 Chevy Silverado 1500
Dark Blue Ext. Cab Automatic
Vortec 5300 5.3L V8 FlexFuel Ethanol/Gasoline Engine
15,900 Miles
Code 3 LED X 2100 Amber Lightbar
Code 3 V-Con PA/Air Horn
Security Spotlights
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Grantman31
 
 Posted: 08-16-2007, 01:15 PM
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Post #5

Quote:
Originally Posted by dargo21
Alas, in my case it does it sitting level on the ground, at idle. And I didn't even let him do it, that's just what he said was the likely cause.

Mine is an instant switch to empty - even when the fuel guage is reading full.
Your situation sounds more like a faulty sending unit or a combination of sensors. His scenario sounds like good old Dodge engineering!
__________________
Current Vehicle:
Silver 2008 Nissan Altima 3.5 SE

Gone but not forgotten:
1996 Dodge Ram 1500 4x4
Sport SLT Laramie Club Cab
5.2L 318 V8
White w/Black trim
90k Miles
Nitto Terra Grappler AT LT265/75R16
Mods:
Flowmaster 40 Series Muffler - Dual Exhaust w/Chrome 4" tips.
Hughes Plenum Reinforcement Kit
Hypertech 180* Thermostat
K&N Drop in


*DodgeTalk.com 318 Enthusiast Member #(78)*

Quote:
Originally Posted by BleedDodge
Why not just inject some fake oxygen into the pipes instead of getting fake sensors? Problem solved.
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w0rm
 
 Posted: 08-16-2007, 02:23 PM
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Post #6

That float could be getting stuck. Might be because you're not filling the tank to full often enough.
BTW Grantman, you like that quote?
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Grantman31
 
 Posted: 08-16-2007, 02:35 PM
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Post #7

Quote:
Originally Posted by w0rm
That float could be getting stuck. Might be because you're not filling the tank to full often enough.
BTW Grantman, you like that quote?
Haha yeah you made me spit my water out when I read it because it was so random, so I put it in my sig. I look around for funny one liners and throw it in my sig but I haven't seen any other great ones recently.
__________________
Current Vehicle:
Silver 2008 Nissan Altima 3.5 SE

Gone but not forgotten:
1996 Dodge Ram 1500 4x4
Sport SLT Laramie Club Cab
5.2L 318 V8
White w/Black trim
90k Miles
Nitto Terra Grappler AT LT265/75R16
Mods:
Flowmaster 40 Series Muffler - Dual Exhaust w/Chrome 4" tips.
Hughes Plenum Reinforcement Kit
Hypertech 180* Thermostat
K&N Drop in


*DodgeTalk.com 318 Enthusiast Member #(78)*

Quote:
Originally Posted by BleedDodge
Why not just inject some fake oxygen into the pipes instead of getting fake sensors? Problem solved.
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w0rm
 
 Posted: 08-16-2007, 02:45 PM
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Post #8

I feel honored
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-Hughes Plenum Pan & Gasket
-Ported TB & Intake Manifold
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w0rm
 
 Posted: 08-16-2007, 02:59 PM
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Post #9

Looks like my 15 mins of fame is over.
__________________

1998 Ram 5.2L 1500 Sport
-Hughes Plenum Pan & Gasket
-Ported TB & Intake Manifold
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Grantman31
 
 Posted: 08-16-2007, 03:08 PM
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Truck Sold :(
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Post #10

Haha sorry, moved on!
__________________
Current Vehicle:
Silver 2008 Nissan Altima 3.5 SE

Gone but not forgotten:
1996 Dodge Ram 1500 4x4
Sport SLT Laramie Club Cab
5.2L 318 V8
White w/Black trim
90k Miles
Nitto Terra Grappler AT LT265/75R16
Mods:
Flowmaster 40 Series Muffler - Dual Exhaust w/Chrome 4" tips.
Hughes Plenum Reinforcement Kit
Hypertech 180* Thermostat
K&N Drop in


*DodgeTalk.com 318 Enthusiast Member #(78)*

Quote:
Originally Posted by BleedDodge
Why not just inject some fake oxygen into the pipes instead of getting fake sensors? Problem solved.
View Public ProfileSend a private message to %1$sSend email to %1$sFind all posts by %1$sAdd %1$s to Your Buddy List Reply Reply With Quote

w0rm
 
 Posted: 08-16-2007, 03:39 PM
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Posts: 444
City: Hamilton
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Post #11

I'm gonna have to start flaming people to get your attention again
__________________

1998 Ram 5.2L 1500 Sport
-Hughes Plenum Pan & Gasket
-Ported TB & Intake Manifold
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