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  #1  
Old 11-27-2022, 08:31 AM
pa38112 pa38112 is offline
 
Join Date: Mar 2008
Location: Clarksboro, NJ
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Default SO tired of in-op fuel gauges

On my 6 the Vans fuel gauges are in-op about 85% of the time. I have replaced both senders and both gauges. I have cleaned all conections, and re-cripmed the wires. Sometimes they start working mi-flight, sometimes one works and not the other. I don't remember replacing the ground wires tot he gauges, but I am sure I would have. Any other suggestions?
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  #2  
Old 11-27-2022, 08:47 AM
jbDC9 jbDC9 is offline
 
Join Date: Jan 2005
Location: Houston, TX
Posts: 972
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IMHO, it's the gauges themselves, they seem to just go wonky at times. My -8 has the Vans analog fuel gauges; over 16 years and 1900+ hours I've replaced the right gauge once already, and now the newer replacement is acting weird. Often on engine start with bus voltage drop, it'll drop to zero, so I then recycle master switch after start to bring it back. Sometimes it'll do a random sweep and maybe stick, so a knuckle tap on the panel frees it up. My left gauge has been solid until this past summer when it just dropped to zero in flight. Knuckle tap didn't help. Next shutdown/start cycle fixed it. Weird.

These gauges aren't produced any more, but, I have a pair of new old stock Vans gauges on the shelf to go in as replacements and one of these days I'll swap them out... if they don't last another 15 years I'll probably replace them with a new pair of Mitchell gauges.
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  #3  
Old 11-27-2022, 12:32 PM
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Sam Buchanan Sam Buchanan is offline
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Join Date: Dec 2004
Location: North Alabama
Posts: 4,679
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Here is the gauge I've been using with the stock Vans senders since the RV-6 first flew in 1999:

https://iflyei.com/product/fl-2-dual-fuel-level


The gauge is very accurate after the first 3-4 gallons are used (this is a function of dihedral in the wings) and blinks to let you know when fuel imbalance has reached a certain point.

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  #4  
Old 11-27-2022, 12:41 PM
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Dan 57 Dan 57 is offline
 
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same config as Sam points out to above… the most precise fuel indics I’ve had on any airplane
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  #5  
Old 11-27-2022, 12:46 PM
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Mel Mel is offline
 
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Location: Dallas area
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Quote:
Originally Posted by Sam Buchanan View Post
Here is the gauge I've been using with the stock Vans senders since the RV-6 first flew in 1999:
https://iflyei.com/product/fl-2-dual-fuel-level
The gauge is very accurate after the first 3-4 gallons are used (this is a function of dihedral in the wings) and blinks to let you know when fuel imbalance has reached a certain point.
This is what I had in my -6 and am installing in my current project. Love this gauge!
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  #6  
Old 11-27-2022, 01:21 PM
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Snowflake Snowflake is offline
 
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Location: Sidney, BC, Canada
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By far a fuel flow meter is the most accurate way to determine how much fuel has flowed through to the engine. Sadly, it can't tell you when the tank has sprung a leak.

I have a Vans sender in each tank and a Red Cube after the pump, all three are connected to my MGL fuel gauge. The level readings are good once the first 1/4 tank is used. The totalizer has been 100% accurate from full to empty, as evidenced by fill-ups where the number on the pump matches the number in the gauge to within 1L.

Were it legal to do so, i'd put a red cube on the flow out of each tank, and get rid of the senders... Subtracting fuel used from fuel total is much more accurate.
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  #7  
Old 11-27-2022, 07:59 PM
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hgerhardt hgerhardt is offline
 
Join Date: Oct 2006
Location: torrance, ca
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My -6 still has the original resistance senders from the late 90's. Every few years the fuel level readouts on the G3X get wonky and swing between empty and the proper level, which might be from lead deposits on the resistance wire. When that happens, I use BG 44K fuel system cleaner (1 can per tank) which clears it up by the time the tank is empty. Learned about 44K here on VAF many years ago.

https://www.bgprod.com/catalog/gasol...ystem-cleaner/
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  #8  
Old 11-27-2022, 09:17 PM
Bevan Bevan is offline
 
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Location: BC
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Quote:
Originally Posted by Mel View Post
This is what I had in my -6 and am installing in my current project. Love this gauge!
I think I have an EI dual fuel gauge as pictured that is sitting on the shelf. Make an offer if interested.

Bevan
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  #9  
Old 11-27-2022, 10:23 PM
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ronrapp ronrapp is offline
 
Join Date: Oct 2007
Location: North Tustin, CA
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Quote:
Originally Posted by pa38112 View Post
On my 6 the Vans fuel gauges are in-op about 85% of the time. I have replaced both senders and both gauges. I have cleaned all conections, and re-cripmed the wires. Sometimes they start working mi-flight, sometimes one works and not the other. I don't remember replacing the ground wires tot he gauges, but I am sure I would have. Any other suggestions?
If it makes you feel any better, I have the exact same issue with the fuel level indicators on my G3X. So I'm not sure it's the analog gauges. I'm guessing the senders are the culprit, but they never seem to work right.

--Ron
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  #10  
Old 11-27-2022, 11:15 PM
springer springer is offline
 
Join Date: May 2012
Location: AZ/MN
Posts: 397
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Quote:
Originally Posted by Snowflake View Post
By far a fuel flow meter is the most accurate way to determine how much fuel has flowed through to the engine. Sadly, it can't tell you when the tank has sprung a leak.

I have a Vans sender in each tank and a Red Cube after the pump, all three are connected to my MGL fuel gauge. The level readings are good once the first 1/4 tank is used. The totalizer has been 100% accurate from full to empty, as evidenced by fill-ups where the number on the pump matches the number in the gauge to within 1L.

Were it legal to do so, i'd put a red cube on the flow out of each tank, and get rid of the senders... Subtracting fuel used from fuel total is much more accurate.
I agree 100% with the use of a fuel flow meter and totalizer as used on my D-180 for true accuracy. I dip my tanks prior to every flight when not full and am always amazed that they are within one gallon of each other. Also back it up with 30 min timing based on a given FF. My fuel gages are pretty worthless until 6 gallons remaining in each tank.
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