 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
yak55m(at)gmail.com
Guest
|
 Posted: Tue Nov 11, 2008 4:14 pm Post subject: Fuel pressure gauge drops after TO in Yak 55m |
 |
|
Hi,
I would like to know if anyone else has experienced this issue before and can provide some details. During taxi and run-up, all gauges look good. My fuel pressure guage (a Mitchell gauge) reads that the fuel pressure is in the green (above 5 PSI) . After TO and during climb, the pressure drops to the bottom of the green arc (2.5 PSI). The engine seems to behave normally at all ranges (full power and cruise). During descent to land and after landing the fuel pressure seems to rise to the normal ranges again(~5 PSI). My mechanic and I agree that it seems like the fuel pump may be the cause for the issue and a new one is the best course of action. I just wanted to see if anyone else has had this experience efore and can explaint it a little more than just a potentally faulty fuel pump.
Thanks,
Anthony.
[quote][b]
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
 |
nigel(at)yakdisplay.com
Guest
|
| Posted: Wed Nov 12, 2008 12:23 am Post subject: Fuel pressure gauge drops after TO in Yak 55m |
|
|
Fuel filter needs a good clean….
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Yak 55M
Sent: 12 November 2008 00:14
To: yak-list(at)matronics.com
Subject: Fuel pressure gauge drops after TO in Yak 55m
Hi,
I would like to know if anyone else has experienced this issue before and can provide some details. During taxi and run-up, all gauges look good. My fuel pressure guage (a Mitchell gauge) reads that the fuel pressure is in the green (above 5 PSI) . After TO and during climb, the pressure drops to the bottom of the green arc (2.5 PSI). The engine seems to behave normally at all ranges (full power and cruise). During descent to land and after landing the fuel pressure seems to rise to the normal ranges again(~5 PSI). My mechanic and I agree that it seems like the fuel pump may be the cause for the issue and a new one is the best course of action. I just wanted to see if anyone else has had this experience efore and can explaint it a little more than just a potentally faulty fuel pump.
Thanks,
Anthony. | Quote: | | http://www.matronics.com/contribution |
01234567890123
[quote][b]
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
yak55m(at)gmail.com
Guest
|
| Posted: Wed Nov 12, 2008 12:53 am Post subject: Fuel pressure gauge drops after TO in Yak 55m |
|
|
Thanks for the reply Nigel - one question though, if it was a dirty fuel filter wouldn't the fuel pressure show a low value during run-up as well?
On Wed, Nov 12, 2008 at 12:22 AM, Nigel Willson <nigel(at)yakdisplay.com (nigel(at)yakdisplay.com)> wrote:
[quote]
Fuel filter needs a good clean….
From: owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com) [mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)] On Behalf Of Yak 55M
Sent: 12 November 2008 00:14
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Fuel pressure gauge drops after TO in Yak 55m
Hi,
I would like to know if anyone else has experienced this issue before and can provide some details. During taxi and run-up, all gauges look good. My fuel pressure guage (a Mitchell gauge) reads that the fuel pressure is in the green (above 5 PSI) . After TO and during climb, the pressure drops to the bottom of the green arc (2.5 PSI). The engine seems to behave normally at all ranges (full power and cruise). During descent to land and after landing the fuel pressure seems to rise to the normal ranges again(~5 PSI). My mechanic and I agree that it seems like the fuel pump may be the cause for the issue and a new one is the best course of action. I just wanted to see if anyone else has had this experience efore and can explaint it a little more than just a potentally faulty fuel pump.
Thanks,
Anthony. 012345678 9012 3
4
[b]
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
nigel(at)yakdisplay.com
Guest
|
| Posted: Wed Nov 12, 2008 1:10 am Post subject: Fuel pressure gauge drops after TO in Yak 55m |
|
|
Not necessarily…. Worth a look in my opinion since it’s relatively straight forwards to do. Try the easy stuff first!
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Yak 55M
Sent: 12 November 2008 08:53
To: yak-list(at)matronics.com
Subject: Re: Fuel pressure gauge drops after TO in Yak 55m
Thanks for the reply Nigel - one question though, if it was a dirty fuel filter wouldn't the fuel pressure show a low value during run-up as well?
On Wed, Nov 12, 2008 at 12:22 AM, Nigel Willson <nigel(at)yakdisplay.com (nigel(at)yakdisplay.com)> wrote:
Fuel filter needs a good clean….
From: owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com) [mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)] On Behalf Of Yak 55M
Sent: 12 November 2008 00:14
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Fuel pressure gauge drops after TO in Yak 55m
Hi,
I would like to know if anyone else has experienced this issue before and can provide some details. During taxi and run-up, all gauges look good. My fuel pressure guage (a Mitchell gauge) reads that the fuel pressure is in the green (above 5 PSI) . After TO and during climb, the pressure drops to the bottom of the green arc (2.5 PSI). The engine seems to behave normally at all ranges (full power and cruise). During descent to land and after landing the fuel pressure seems to rise to the normal ranges again(~5 PSI). My mechanic and I agree that it seems like the fuel pump may be the cause for the issue and a new one is the best course of action. I just wanted to see if anyone else has had this experience efore and can explaint it a little more than just a potentally faulty fuel pump.
Thanks,
Anthony.
| Quote: | | _blank">http://www.matronics.com/contributionet="_blank">http://www.matronics.com/Navigator?Yak-List |
0
123456789012345678901234
[quote][b]
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
DB2
Joined: 03 Nov 2007
Posts: 3
Location: Houston, TX
|
| Posted: Wed Nov 12, 2008 6:53 am Post subject: Re: Fuel pressure gauge drops after TO in Yak 55m |
|
|
According to Mr. Bernoulli, if the effective cross-sectional area of your filter has been reduced due to a clog etc - and not allowing unrestricted flow of the fuel - the pressure loss across the filter will roughly be a function of the square of the flow rate (well, actually, the velocity of the fuel through the line).
So, when the fuel flow rate is highest - during take-off and climb - you will see a much greater (or just plain noticeable) drop in fuel pressure as opposed to when the flow rate is low (taxi, descent). During run-up the engine is not under the same load as it is during the climb, and thus the fuel flow rate will be lower.
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
flushjohnson(at)charter.n
Guest
|
| Posted: Wed Nov 12, 2008 7:06 am Post subject: Fuel pressure gauge drops after TO in Yak 55m |
|
|
Check your vent system. At low power settings a clogged vent will not be as apparent as higher settings.
[quote] ---
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
petervs(at)knology.net
Guest
|
| Posted: Wed Nov 12, 2008 2:01 pm Post subject: Fuel pressure gauge drops after TO in Yak 55m |
|
|
This reminds me of the first time I did a condition inspection on my Yak. I
took out the fine fuel filter and it looked fine, very clean in fact. Then I
tried to blow through it and could not hardly blow through it. I put it in
my ultrasonic cleaner in some mineral spirits and a bunch of very fine
debris came out of the filter. After, I could easily blow through it.
Something to think about.
Pete
__|__
__|__ ----=(*)=---- __|__
----=(*)=---- __|__ ----=(*)=----
----=(*)=----
--
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
czech6(at)mesanetworks.ne
Guest
|
| Posted: Wed Nov 12, 2008 3:06 pm Post subject: Fuel pressure gauge drops after TO in Yak 55m |
|
|
Oh my God, don't get him started!
--
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
