Fuel Gauge goes to Empty and Back? - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
 
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#1 Old 08-16-2007, 11:33 AM
geobj
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Fuel Gauge goes to Empty and Back?

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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#2 Old 08-16-2007, 11:55 AM
dargo21
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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.

Personal Truck:
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#3 Old 08-16-2007, 01:02 PM
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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.

Current Vehicle:
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5.2L 318 V8
White w/Black trim
90k Miles
Nitto Terra Grappler AT LT265/75R16
Mods:
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Hughes Plenum Reinforcement Kit
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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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#4 Old 08-16-2007, 01:07 PM
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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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#5 Old 08-16-2007, 01:15 PM
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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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#6 Old 08-16-2007, 02:23 PM
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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?


1998 Ram 5.2L 1500 Sport
-Hughes Plenum Pan & Gasket
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#7 Old 08-16-2007, 02:35 PM
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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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#8 Old 08-16-2007, 02:45 PM
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I feel honored


1998 Ram 5.2L 1500 Sport
-Hughes Plenum Pan & Gasket
-Ported TB & Intake Manifold
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#9 Old 08-16-2007, 02:59 PM
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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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#10 Old 08-16-2007, 03:08 PM
Grantman31
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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.
Grantman31 is offline  
#11 Old 08-16-2007, 03:39 PM
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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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