Fuel guage jumping!!
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New User
Joined: Sep 2001
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Fuel guage jumping!!
I have a 2000 F150 with the 5.4L. There are 54,000 miles on the truck. Within the past month the fuel guage will read 3/4 tank and then the next time you look at it the reading could be 1/2 tank. As you are driving you can see it start to move around. From 1/2 to 1/4 tank it is worse. The movement isn't small and you can see it move and bounce around.
Any ideas on what the problem is? It goes to the dealer in 2 weeks for the problem but the person I made the appointment with blamed it on fuel moving in the tank. While this may be I doubt it since it just started doing this. I have had the truck since 25,000 miles and again this is new. I'm just worried that they will use this as the excuse when it isn't the problem. Of course it doesn't happen all the time but about 50% of the time.
Thanks for the feedback and ideas.
Brian
Kind of reminds me of my fuel guage!
Any ideas on what the problem is? It goes to the dealer in 2 weeks for the problem but the person I made the appointment with blamed it on fuel moving in the tank. While this may be I doubt it since it just started doing this. I have had the truck since 25,000 miles and again this is new. I'm just worried that they will use this as the excuse when it isn't the problem. Of course it doesn't happen all the time but about 50% of the time.
Thanks for the feedback and ideas.
Brian
Kind of reminds me of my fuel guage!
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Joined: Jan 2008
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Fuel guage jumping!!
Most Likely
The Sending unit in the tank
Dennis
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The Sending unit in the tank
Dennis
F.T.E. Assistant Administrator
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[font color=red]
"May The Spirit Of Christmas Be An Inspiration To You Throughout The Year"[/font]
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[link: motorhaven.autoanything.com|How YOU Can Support This Site]
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Thread Starter
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New User
Joined: Sep 2001
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Fuel guage jumping!!
Ok now what? The last 2 tanks the guage has been fine. Prior to that I also ran through 2 bottles of fuel injector cleaner. Do I take the truck in and pay $25 for a rental car and $50 deductable for them to tell me it is nothing? If I don't take it in now it will be difficult through the end of March due to school and work. Can the dealer test the sending unit and check grounds?
Thanks,
Brian
Thanks,
Brian
Post Fiend
Joined: Apr 2002
Posts: 7,157
Likes: 1
From: Central Kali
Fuel guage jumping!!
Go to Radio Shack and buy a cheap digital multi-meter. Find the wire that comes from the sending unit in the tank. If you disconnect the gauge, you can measure the resistence of the sender. Lower resistence meams more fuel in the tank. Test drive it and see if it jumps around. If it does, it is the sender or it's ground wire.
You also could just clip on the wire and measure dc voltage. A full tank would probably read 0 volts. As the tank drops, the voltage would rise.
You also could just clip on the wire and measure dc voltage. A full tank would probably read 0 volts. As the tank drops, the voltage would rise.
