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billderou(at)yahoo.com
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 Posted: Mon Apr 13, 2009 7:37 am Post subject: Possible problem with fuel over pressure |
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While crusing at 12,500 feet I got an engine warning with the fuel system pressure at 52psi. I turned on the electric fuel pump and it went away for 10 seconds and then was back. Thereafter, there was no effect whether the electric fuel pump was on or off.
Next I looked at the fuel flow indicator and it was spot-on and steady, also the engine never wavered. I am thinking that it is probably a sensor problem or the wiring associated with the sensor. Flew a second flight yesterday with no warning.
Has anybody had experience with such a problem? It seems improbable that a mechanical fuel pump running at a somewhat low rpm would create that much pressure.
Bill DeRouchey
N939SB, flying
[quote][b]
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jesse(at)saintaviation.co
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| Posted: Mon Apr 13, 2009 8:23 am Post subject: Possible problem with fuel over pressure |
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I have never seen this. I would definitely check the sensor connection first, and maybe even the engine monitor setting for the sensor. A call to your engine builder will tell you if it is even possible for the engine-driven pump to put out that kind of pressure.
do not archive
Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com (jesse(at)saintaviation.com)
Cell: 352-427-0285
Fax: 815-377-3694
On Apr 13, 2009, at 11:36 AM, Bill DeRouchey wrote:
[quote]While crusing at 12,500 feet I got an engine warning with the fuel system pressure at 52psi. I turned on the electric fuel pump and it went away for 10 seconds and then was back. Thereafter, there was no effect whether the electric fuel pump was on or off.
Next I looked at the fuel flow indicator and it was spot-on and steady, also the engine never wavered. I am thinking that it is probably a sensor problem or the wiring associated with the sensor. Flew a second flight yesterday with no warning.
Has anybody had experience with such a problem? It seems improbable that a mechanical fuel pump running at a somewhat low rpm would create that much pressure.
Bill DeRouchey
N939SB, flying
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saolesen(at)sirentel.net
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| Posted: Mon Apr 13, 2009 8:25 am Post subject: Possible problem with fuel over pressure |
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Bill,
I had the same problem with erratic high readings on the fuel pressure and solved it with a new heavier ground wire.
Sheldon Olesen
N475PV 57.3 hours
On Apr 13, 2009, at 10:36 AM, Bill DeRouchey wrote:
[quote]While crusing at 12,500 feet I got an engine warning with the fuel system pressure at 52psi. I turned on the electric fuel pump and it went away for 10 seconds and then was back. Thereafter, there was no effect whether the electric fuel pump was on or off.
Next I looked at the fuel flow indicator and it was spot-on and steady, also the engine never wavered. I am thinking that it is probably a sensor problem or the wiring associated with the sensor. Flew a second flight yesterday with no warning.
Has anybody had experience with such a problem? It seems improbable that a mechanical fuel pump running at a somewhat low rpm would create that much pressure.
Bill DeRouchey
N939SB, flying
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