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  #1  
Old 06-26-2020, 03:52 PM
mxhossai mxhossai is offline
 
Join Date: Feb 2018
Location: Ashburn, Virginia
Posts: 49
Default Fuel PSI indicator fault

Made a long trip to Atlanta from Virginia. Saw fuel psi had a big red cross and no reading. But fuel flow seems fine and everything runs good. Any idea what may be the issue?

Thank you,
Monir
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  #2  
Old 06-26-2020, 03:57 PM
DHeal DHeal is offline
 
Join Date: Sep 2006
Location: Windsor, California
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Likely an open circuit -- check all the sensor wiring -- make sure the sensor electrical plug is fully seated. You can troubleshoot somewhat by wiggling various elements of the wiring and watching for the big red X to disappear.
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  #3  
Old 06-26-2020, 05:32 PM
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hgerhardt hgerhardt is offline
 
Join Date: Oct 2006
Location: torrance, ca
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Give us some more information: is your airplane fuel injected? Does it have Kavlico sensors? (see pic below) If so, do a search on this forum. I think one of the failure modes is the red X.

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  #4  
Old 06-26-2020, 08:58 PM
mxhossai mxhossai is offline
 
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Location: Ashburn, Virginia
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I have Rotax 912ULS. Not sure. Where do I check. Sorry bought this recently.
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  #5  
Old 06-26-2020, 09:55 PM
DHeal DHeal is offline
 
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Your fuel pressure sensor is located on the upper forward left side of the firewall. The 912ULS engine is carbureted (not fuel injected).

See Page 45A-05: https://www.vansaircraft.com/service...revisions/45a/
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EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 915+ hours (as of June 2020)!
VAF donation through June 2021.

Last edited by DHeal : 06-26-2020 at 09:59 PM.
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  #6  
Old 06-27-2020, 06:14 AM
mxhossai mxhossai is offline
 
Join Date: Feb 2018
Location: Ashburn, Virginia
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David,

I should have been more clear, I did know thats ita not fuel injected but didnt know the pressure sensir location. Drawaing makes it clear. So will peruse the threads related to sensor failure. Thank you both. Helps like this makes a novice a little less novice :-)
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  #7  
Old 06-27-2020, 06:37 AM
deene deene is offline
 
Join Date: Jan 2005
Location: Georgetown, TX
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Hi Monir. You should also check the RV12 service bulletin, SB00006 issued recently concerning possible leaking problems with some Kavlico sensors:

https://www.vansaircraft.com/service...ions/sb-00006/
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  #8  
Old 06-27-2020, 09:18 AM
mxhossai mxhossai is offline
 
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Location: Ashburn, Virginia
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Thank you Deene, Will do.

Last edited by mxhossai : 06-27-2020 at 09:24 AM.
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  #9  
Old 06-30-2020, 12:22 PM
mxhossai mxhossai is offline
 
Join Date: Feb 2018
Location: Ashburn, Virginia
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In the same long trip (11 hours down/up), another thing happened: completely loss EGT Left. So the fuel psi and left EGT both has big Xs on them. Sounds like individual issues, or could this be loose connection somewhere that's causing both of these symptoms? If later, where should I start looking?
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  #10  
Old 06-30-2020, 01:52 PM
DHeal DHeal is offline
 
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Location: Windsor, California
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Likely individual loose connections -- not related. Check all associated connectors and wiring. You can swap EGT leads from left side to right side to see if fault follows wiring or probe.
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EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 915+ hours (as of June 2020)!
VAF donation through June 2021.
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