Fuel gauge stuck on full

Peragro · 11-06-2009, 01:01 PM

Hi all;

I bought this truck a couple of weeks ago. Everything except the front vents worked fine - more on that later. Yesterday, for some reason, the fuel gauge went to full. When I turn the truck off and take out the key it goes to empty, but goes right back up to full when I start again. I'm thinking an electrical issue? But does it sound familiar to anyone?

Now, with the front vents; I traced it to a broken and very brittle vacuum line running along the firewall and into the cab on the passenger side. I temporarily fixed it with some tubing but I know it'll break again soon. Is there a good place to buy this rigid vacuum tubing? There's no Dodge dealer in town anymore and all of the parts store folks look at me funny when I ask about hard vacuum line.

__________________
1998 12V 4x2 Short bed

Pretty much stock because I'm afraid of upcoming smog rules for diesels here in the PRK.

deyell01 · 11-06-2009, 03:54 PM

For the fuel guage I have had that happen to mine when I fill the tank to full. It stays up there for a while but will eventually come back to normal.

__________________
98 3/4 ton extended cab, 5 speed, cold air intake, star wheel cranked, fuel plate and AFC full forward, guages, straight piped. 305/70R16 mud terrains on Eagle Alloys. 2003 chevy buckets.

arxalot · 11-06-2009, 07:47 PM

Had the same problem when I purchased my truck. Gauge showed full when the key was turned on. Had to drop the tank and replace fuel "sending unit" on the side of the fuel module. Think it cost around 40$-50$ from the dealer. Not a big deal...just a couple of hours of time.

__________________
1998 2WD "Grail" 12-Valve (All Stock....for now)

Smoke?Check · 11-06-2009, 07:58 PM

Wish mine said full, its always on E, and I have to look at the idiot light. I need to find time to replace my sending unit

__________________
1994 3500 2wd reg cab dually 12v 320k miles dont know what all is done to it. str8 pipe and no fuel plate. soon to be black all over. bbm pin me 31ca1e95

illflem · 11-06-2009, 09:01 PM

Sometimes you can fix the stuck on full problem by kicking or hitting the tank with rubber mallet.
Some senders tend to get stuck on full when people fill the tank to the brim.

__________________
Bill
'95 2500 4wd auto
'95 3500 5 speed heavy hauler
Not stock

Peragro · 11-07-2009, 09:41 PM

So I went out to the desert today and drove on some nice washboard dirt roads. That seemed to do the trick. Fuel gauge is now back to reading whatever it thinks the fuel level is.

Thanks for the replies.

__________________
1998 12V 4x2 Short bed

Pretty much stock because I'm afraid of upcoming smog rules for diesels here in the PRK.

11-06-2009, 01:01 PM	#1 (permalink)
Peragro Newbie Join Date: Nov 2009 Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts Peragro's Truck Pics	Fuel gauge stuck on full Hi all; I bought this truck a couple of weeks ago. Everything except the front vents worked fine - more on that later. Yesterday, for some reason, the fuel gauge went to full. When I turn the truck off and take out the key it goes to empty, but goes right back up to full when I start again. I'm thinking an electrical issue? But does it sound familiar to anyone? Now, with the front vents; I traced it to a broken and very brittle vacuum line running along the firewall and into the cab on the passenger side. I temporarily fixed it with some tubing but I know it'll break again soon. Is there a good place to buy this rigid vacuum tubing? There's no Dodge dealer in town anymore and all of the parts store folks look at me funny when I ask about hard vacuum line. __________________ 1998 12V 4x2 Short bed Pretty much stock because I'm afraid of upcoming smog rules for diesels here in the PRK.

11-06-2009, 07:47 PM	#3 (permalink)
arxalot Newbie Join Date: Sep 2009 Location: Texas Posts: 8 Thanks: 0 Thanked 0 Times in 0 Posts arxalot's Truck Pics	Stuck fuel gauge Had the same problem when I purchased my truck. Gauge showed full when the key was turned on. Had to drop the tank and replace fuel "sending unit" on the side of the fuel module. Think it cost around 40$-50$ from the dealer. Not a big deal...just a couple of hours of time. __________________ 1998 2WD "Grail" 12-Valve (All Stock....for now)

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11-06-2009, 03:54 PM	#2 (permalink)
deyell01 Newbie Join Date: Jun 2009 Location: Wainwright, Alberta Posts: 29 Thanks: 0 Thanked 0 Times in 0 Posts deyell01's Truck Pics	For the fuel guage I have had that happen to mine when I fill the tank to full. It stays up there for a while but will eventually come back to normal. __________________ 98 3/4 ton extended cab, 5 speed, cold air intake, star wheel cranked, fuel plate and AFC full forward, guages, straight piped. 305/70R16 mud terrains on Eagle Alloys. 2003 chevy buckets.

11-06-2009, 07:58 PM	#4 (permalink)
Smoke?Check Cummins Fan Join Date: Sep 2009 Location: Gatesville, the REPUBLIC of TEXAS Posts: 35 Thanks: 1 Thanked 1 Time in 1 Post Smoke?Check's Truck Pics	Wish mine said full, its always on E, and I have to look at the idiot light. I need to find time to replace my sending unit __________________ 1994 3500 2wd reg cab dually 12v 320k miles dont know what all is done to it. str8 pipe and no fuel plate. soon to be black all over. bbm pin me 31ca1e95

11-06-2009, 09:01 PM	#5 (permalink)
illflem Moderator Join Date: Nov 2005 Location: Montana Posts: 4,961 Thanks: 4 Thanked 142 Times in 130 Posts illflem's Truck Pics	Sometimes you can fix the stuck on full problem by kicking or hitting the tank with rubber mallet. Some senders tend to get stuck on full when people fill the tank to the brim. __________________ Bill '95 2500 4wd auto '95 3500 5 speed heavy hauler Not stock

11-07-2009, 09:41 PM	#6 (permalink)
Peragro Newbie Join Date: Nov 2009 Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts Peragro's Truck Pics	So I went out to the desert today and drove on some nice washboard dirt roads. That seemed to do the trick. Fuel gauge is now back to reading whatever it thinks the fuel level is. Thanks for the replies. __________________ 1998 12V 4x2 Short bed Pretty much stock because I'm afraid of upcoming smog rules for diesels here in the PRK.