VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #1  
Old 02-19-2021, 05:59 AM
vickruis vickruis is offline
 
Join Date: Dec 2007
Location: Breda, The Netherlands
Posts: 44
Default VDO fuel sensor

Iím having an intermittent high fuel pressure warning from my AFS 4500. Fuel pressure is way too high, sometimes even before starting the engine. I suspected and cleaned the grounds with no effect. AFS warns the VDO sensors wear out as early as in 200 hours, so after 480 hours it is time to replace this one. Replacing the VDO by a more reliable Kavlico requires a rewiring, not my choice for now.
Looking in the Spruce catalogue I find that VDO warns that their pressure senders (in this case P/N 10-06581) are not to be used with any type of fuel application. Huh?
The AFS manual shows a VDO fuel pressure sender, P/N 41315Ö. Is this the same sensor, and does anybody know why VDO warns against the use in fuel applications? I mean, apart from the 200 hrs lifespan...
__________________
Victor Kruis
RV7A
PH-OBO (The Netherlands)
Flying!

http://www.hobopagina.nl/RV7a/Index.htm
Reply With Quote
  #2  
Old 02-19-2021, 06:17 AM
BH1166 BH1166 is offline
 
Join Date: Nov 2017
Location: Eatonton Georgia
Posts: 415
Default GRT

Many vendors use VDO senders. Yes they fail often it seems, and others get lots of time from them. Iíve read the fuel use warning. Maybe the fuel fumes damages them. The VDO brands come in various pressure measuring range... low for carbs and higher for fuel injection applications. Just replace ($50-$65) and hope all goes back to normal is my opinion. A google search for me doesnít find the 41315 model.
__________________
Butch
RV6A Purchased N72TX
Reply With Quote
  #3  
Old 02-19-2021, 06:29 AM
vickruis vickruis is offline
 
Join Date: Dec 2007
Location: Breda, The Netherlands
Posts: 44
Default

As far as I can tell this AFS part number 41315 has the same specifications as the Spruce part number. I'm located in Europe, ordering directly from AFS would see shipping costs way higher than the cost of the sensor.
__________________
Victor Kruis
RV7A
PH-OBO (The Netherlands)
Flying!

http://www.hobopagina.nl/RV7a/Index.htm
Reply With Quote
  #4  
Old 02-19-2021, 06:33 AM
BH1166 BH1166 is offline
 
Join Date: Nov 2017
Location: Eatonton Georgia
Posts: 415
Default

Quote:
Originally Posted by vickruis View Post
The AFS manual shows a VDO fuel pressure sender, P/N 41315Ö. Is this the same sensor, and does anybody know why VDO warns against the use in fuel applications? I mean, apart from the 200 hrs lifespan...
I think your part number is one AFS gave it. Seems all vdo numbers start 36...
__________________
Butch
RV6A Purchased N72TX
Reply With Quote
  #5  
Old 02-19-2021, 06:46 AM
David_Nelson's Avatar
David_Nelson David_Nelson is offline
 
Join Date: Feb 2006
Location: Austin, TX
Posts: 435
Default VDO Part Number / Identifying Marks

Hi Victor,

Like you, I went through VDO pressure sensors on a regular basis. Some lasted as long as ~100 hours. At ~50 USD each, it wasn't a big expense but their reliability was poor and they seemed to start failing on cross country trips. Looks like you're running an IO-360 so I'm going to presume that you're using the 80 PSI unit. I think the VDO part number was '360-003'. Looking at the facets where you tighten the sensor with a wrench, you should see a '29/4' stamp. I used this link to properly identify the VDO part-number:

https://www.jegs.com/p/VDO/VDO-Press...87192/10002/-1

In the end, I ordered the replacements from a reputable online auto-parts store.


I took two of the sensors apart and the failures were different. In one, the internal resistive coil had been worn out by the wiper (presumably from the mechanical fuel pump pressure pulses). The other failure was due to an internal wire breaking where it connected to the external terminal that passes through the case.

As to your question, I don't know why the fuel warning.

Good luck to you,
__________________
/\/elson
RV-7A Tip-Up
NW Austin, TX
Reply With Quote
  #6  
Old 02-21-2021, 10:38 PM
RV7A Flyer's Avatar
RV7A Flyer RV7A Flyer is offline
 
Join Date: Jul 2013
Location: US
Posts: 2,414
Default

Do yourself a favor...ditch the VDOs and spend an afternoon running one more wire for power. I went through a handful of VDOs before Dynon started selling the Kavlicos, switched over and have had zero problems with them since installing them around 600 hours ago.

"'Tis a false economy to invest in cheap goods." Not to mention, passengers get nervous when the systems sets off alarms for fuel or oil pressure, even if *you* know they're not a real problem.
__________________
2019 Dues paid!
Reply With Quote
  #7  
Old 02-22-2021, 09:41 AM
abwaldal@gmail.com abwaldal@gmail.com is offline
 
Join Date: Jan 2017
Location: Battle Ground WA
Posts: 187
Default Shortage of supply

Just went through this problem. Tried to buy a high pressure Kavlico. It's about 4 months out so I had to buy the VDO
You mileage may be different. I tried a half dozen vendors including Dynon.
Art

Last edited by abwaldal@gmail.com : 02-22-2021 at 01:54 PM.
Reply With Quote
  #8  
Old 02-24-2021, 12:48 AM
bruceh's Avatar
bruceh bruceh is offline
 
Join Date: Mar 2008
Location: Ramona, CA
Posts: 2,432
Default Try other suppliers

If you search for the new Kavlico part number P255-150G-E4A you will find lots of supply at various component suppliers like Allied Electronics.
__________________
Bruce Hill
RV-9A N5771H flown over 800 hours!
http://www.overthehills.com/RV-9A-Project
APRS Tracking for KJ6YRP and New Flying Blog
2020 VAF donator
EAA Tech Counselor, Build assistance - canopy/tanks/fiberglass/electrical/repairs
Reply With Quote
  #9  
Old 02-24-2021, 07:12 AM
MacCool's Avatar
MacCool MacCool is offline
 
Join Date: Aug 2020
Location: central Minnesota
Posts: 541
Default

Advanced Flight, Dynon, and Garmin have all sent out service bulletins this past May recommending replacement of the previous Kavlico pressure sensors with their newer, higher pressure upgraded 150 psi fluid pressure sensor due to a "small number" of leaks, including sprays. No crashes, no fuel exhaustion, no fires reported.

The Dynon/AFS part number for that sensor is 103757-000 (0-150 psi). The Garmin part number is the same as the Kavlico part number P255-150G-E4A.

People must be heeding that advice...that 103757-000 sensor is pretty hard to find...backordered most aircraft specialty stores. I didn't look at places like Allied.

https://www.advancedflightsystems.co...in-050620a.php

https://www.dynonavionics.com/bullet...in_050620E.php

https://www.garmin.com/en-US/aviatio...ntal-aircraft/

Last edited by MacCool : 02-24-2021 at 07:27 AM.
Reply With Quote
  #10  
Old 03-24-2021, 06:37 AM
MacCool's Avatar
MacCool MacCool is offline
 
Join Date: Aug 2020
Location: central Minnesota
Posts: 541
Default

Quote:
Originally Posted by MacCool View Post
Advanced Flight, Dynon, and Garmin have all sent out service bulletins this past May recommending replacement of the previous Kavlico pressure sensors with their newer, higher pressure upgraded 150 psi fluid pressure sensor due to a "small number" of leaks, including sprays. No crashes, no fuel exhaustion, no fires reported.

The Dynon/AFS part number for that sensor is 103757-000 (0-150 psi). The Garmin part number is the same as the Kavlico part number P255-150G-E4A.

People must be heeding that advice...that 103757-000 sensor is pretty hard to find...backordered most aircraft specialty stores. I didn't look at places like Allied.
I originally ordered two of these from Aircraft Spruce to replace oil and fuel pressure sensors per the AFS service bulletin. That was on Feb 22. One was promptly sent, the other has been on backorder for more than a month, so I canceled and ordered from Allied, which appears to have plenty of them. Same price.
__________________
RV-9A, 2011, bought flying
IO-320D1A
IFR certified
AFS 5400/3500, G5, 430W, some other stuff
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 07:54 PM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.