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  #11  
Old 12-01-2020, 04:39 PM
Avanza Avanza is offline
 
Join Date: Jul 2020
Location: Vastervik Sweden
Posts: 140
Smile FUEL FILTER

This is a new installation ?
I should check the fuel filter.
Good Luck
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  #12  
Old 12-05-2020, 06:37 PM
dmattmul dmattmul is offline
 
Join Date: Dec 2015
Location: Spring Hill, FL
Posts: 386
Default Sender error

The flow GPM checked ok (38 GPH) I so it wasnít the filters or possibly a check valve issue. The culprit is the sender. Mechanical gauge installed fuel pressure goes up slightly as suppose to with higher manifold pressure. The sender is mounted to the fire wall through the tri-manifold setup Vans uses on the 14. Iíll see if I can better isolate this in case vibration is the issue. If not need to learn to live with 32 psi indicated on departures.
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RV-14A QB builds, Lycoming 390 Thunderbolt arrived July 2019, Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, Whirlwind 300-72, Earth-X batteries, Parts became a real airplane 8/15/2020.
Started RV-10 Nov 2020. Empennage arrived (Built) Working on QB kits. Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, Whirlwind 3 blade, Earth-X batteries, real airplane hopefully early 2024. Paid subscriber and more. (Worth every dollar contributed).
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  #13  
Old 12-06-2020, 03:14 PM
TS Flightlines TS Flightlines is offline
 
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 3,087
Default

Dwight----IF the sender is grounded by the body, an over abundance of thread sealer 'might' be giving an intermittent ground. Just a theory---had it happen once years ago in a different application.
Tom
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Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
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  #14  
Old 06-05-2022, 07:51 AM
dmattmul dmattmul is offline
 
Join Date: Dec 2015
Location: Spring Hill, FL
Posts: 386
Default Answer

Noticed I never did post the resolution or at least not on this thread. The issue was self-inflicted and want to thank Robert, Steve and all the great RV suppliers out there for the help. Turns out that I had a very slight leak on the input side of the pump in the tunnel. It never leaked fuel, (When I was in the airframe), did not smell because the system is not at any pressure on this side of the pump. (There was a very slight blue stain under the fitting) This small leak must have occurred after each shutdown when I was not in the airframe. The leak allowed air bubbles to enter the system and vibrated the fuel pressure regulator seat damaging it. Last 100 hours system has worked great. Last conditional looked over the tunnel very closely. (Should have installed access panels to make this inspection easier but with pre and post fuel filters located there probably disassembly is the better alternative.
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RV-14A QB builds, Lycoming 390 Thunderbolt arrived July 2019, Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, Whirlwind 300-72, Earth-X batteries, Parts became a real airplane 8/15/2020.
Started RV-10 Nov 2020. Empennage arrived (Built) Working on QB kits. Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, Whirlwind 3 blade, Earth-X batteries, real airplane hopefully early 2024. Paid subscriber and more. (Worth every dollar contributed).
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  #15  
Old 06-05-2022, 08:02 AM
airguy's Avatar
airguy airguy is offline
 
Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,868
Default

Quote:
Originally Posted by dmattmul View Post
Noticed I never did post the resolution or at least not on this thread. The issue was self-inflicted and want to thank Robert, Steve and all the great RV suppliers out there for the help. Turns out that I had a very slight leak on the input side of the pump in the tunnel. It never leaked fuel, (When I was in the airframe), did not smell because the system is not at any pressure on this side of the pump. (There was a very slight blue stain under the fitting) This small leak must have occurred after each shutdown when I was not in the airframe. The leak allowed air bubbles to enter the system and vibrated the fuel pressure regulator seat damaging it. Last 100 hours system has worked great. Last conditional looked over the tunnel very closely. (Should have installed access panels to make this inspection easier but with pre and post fuel filters located there probably disassembly is the better alternative.
I had a similar issue on my SDS, I had changed out all my rubber components on the fuel system for running 93E10, but I missed ONE seal on a fuel prefilter, upstream of the pumps, on the left tank. The O-ring deteriorated from the E10 fuel, cracked, and started sucking air. Hard to find... I ended up draining the tanks and pressurizing with air, and spraying soap water all over every fitting before finding it.

It's the little things....
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N16GN flying 1,000 hrs and counting on 91E10; IO360, SDS, WWRV200, Dynon HDX, IFD440, G5
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now.
Pending Repeat Offender - 10 kit is on order. TDI? Turbine? Stay tuned!
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