VDO Fuel Gauge moving around when driving????? - Defender Source
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  #1  
Old February 8th, 2014, 05:33 PM
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VDO Fuel Gauge moving around when driving?????

Guys, need your help. I switch my tach, temp and fuel gauges over to VDO today. The VDO fuel gauge reads the correct fuel level at start and when I'm moving slowly, but as I speed up and the car is rocked more the gauge starts going up as well. It does come back down to the "correct" level when I stop, but clearly something is wrong. Any ideas?
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  #2  
Old February 8th, 2014, 06:44 PM
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I'm assuming it didn't do it with the old gauge?
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  #3  
Old February 8th, 2014, 06:56 PM
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Thy have a lot less dampening than the stock gauges so do move around more.
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  #4  
Old February 8th, 2014, 07:40 PM
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I didn't notice any with the old gauge... I'm sure there should be more movement here, but this seems like way too much. I have 1/4 of tank and it goes up to close to 3/4, back to 1/2 and then if I'm cruising I believe I'm back to an accurate reading.
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  #5  
Old February 8th, 2014, 07:42 PM
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How long does it take to go back to "normal" once at a complete stop?
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  #6  
Old February 9th, 2014, 09:21 AM
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if i make a hard right hand turn with half a tank itll go below empty on the gauge its just the way it is, almost like a game
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  #7  
Old February 9th, 2014, 10:22 AM
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I'm fairly sure that is normal. Mine moved around a bit, but I'm not sure if it moved around as much as you're talking about.
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  #8  
Old February 9th, 2014, 11:15 AM
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The fuel gauge in my 97 is doing the same thing. Jumps wildly. I feel like it seems to find "home" as it goes left, but can slide way to the right in all sorts of driving (slow, at speed, up hill, down hill, etc.)

Is it the sensor in the tank? Or is the gauge malfunctioning? Any known fixes?
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Old February 9th, 2014, 11:49 AM
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It is real. Fuel level floats move around. The stock gauge has huge amounts of dampening, so you don't see it. The VDO doesn't and you see the actual movement.
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Old February 10th, 2014, 01:00 PM
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Once I come to a stop it seems to take about 30 seconds, maybe up to a min to get back to "normal".

Is there any "fix" to dampen the VDO? This is insanely annoying.
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  #11  
Old February 10th, 2014, 01:05 PM
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Stop staring at the fuel gauge and you will be fine....
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  #12  
Old February 10th, 2014, 01:05 PM
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In further googling... I'm going to check my grounds again tonight. Sounds like wild oscillation is generally related to a weak ground.
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  #13  
Old February 10th, 2014, 01:08 PM
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This is a good thread. I'm about to order all new gauges and this would drive me crazy.
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  #14  
Old February 10th, 2014, 08:59 PM
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Quote:
Originally Posted by blaughva View Post
In further googling... I'm going to check my grounds again tonight. Sounds like wild oscillation is generally related to a weak ground.
nope it's normal.
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  #15  
Old February 10th, 2014, 09:02 PM
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My factory stock gauge has done this since 2002. I don't know why it does but I get pretty consistent mileage so it really doesn't bother me. That said, I'd still like to know how to stop it of fix the problem.
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  #16  
Old February 10th, 2014, 09:49 PM
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My factory gauge started bouncing last year. Annoying but it still works.
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  #17  
Old February 10th, 2014, 10:05 PM
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It is possible you have bad connections or a bad sender. I've seen the senders wear out so that you get dead spots. It would bounce low if the sender had dead spots. The senders are pretty low tech.
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  #18  
Old April 22nd, 2014, 11:36 PM
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For what its worth, my '97 NAS is doing the same thing with the original OE gauge. Its all over the map.
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  #19  
Old April 23rd, 2014, 01:09 AM
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Well came down hard off a ledge and the rear bumper hit solidly on a rock. The gauge has read almost full ever since. Not sure what that act caused but maybe the fuel level arm fell off. I ordered an entire unit for a RR P38 since it has a similar design & a lot les $$ than the D90 unit (of course I'll have to gut he pump out of it since it's converted to a 300Tdi.) Figured since it's 17 years old now & I don't want to pull the tank twice, I'd just replace it, this time in. I've checked the grounds and don't seem to have an issue there, so I figure it's the mechanism. I'll just use the D90 arm & float on the P38 unit.
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  #20  
Old April 23rd, 2014, 07:33 AM
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The old gauge bounced around in mine and I changed it for the VDO with the same results. I checked all the wiring back to the fuel tank and cleaned and greased (dielectric) all the connectors. I still have the bouncing.

I thought of changing the fuel sender but I'm suspecting that will be a waste of money.

I'm planning on checking the fuel level like I do on my plane, with a stick!

My speedometer bounces around as well after having changed the gauge and the cable. I installed a heads up speedometer display that works off a GPS signal.

I think on these vehicles the appropriate cliché is: "we don't need no stinkin gauges"
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