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Date: Fri, 06 Jul 2012 10:50:57 -0400
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From: Gary Casey <casey.gary@yahoo.com>
Reply-To: Gary Casey <casey.gary@yahoo.com>
Subject: Re: Fuel Pressure Problems
In-Reply-To: <listdigest-5640113@logan.com>
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Just a suggestion here, but maybe you should take the time to determine jus=
t what is off kilter. =A0At 50 LOP you are right on the edge of a significa=
nt reduction in power. =A0I would suggest leaning beyond the 40 LOP mention=
 until the engine loses significant power. =A0It shouldn't take much. =A0Th=
at is proof positive that you as lean as the EGT says you are. =A0Given tha=
t confirmation, the anomaly must be an error in the fuel pressure reading, =
or some problem with the fuel system that allows normal mixture to be maint=
ained with an abnormal fuel pressure reading. =A0The engine tells the tale =
- it can't be fooled.=0AJust a thought from one not too familiar with the C=
ontinental fuel system.=0AGary Casey=0A=0AJust started having a change in f=
uel pressure at cruise.=A0 I have a Legacy ... 550N ... been cruising 40 to=
 60 degrees lean of peak with no problem, with fuel pressure above 8.2 psi.=
 Depending on altitude 2500 rpm - 2300 rpm ... 11.5 to 11.8 gph ...=0A=A0=
=0AThe last few flights I can not get=A040 degrees lean of peak at any alti=
tude without the fuel pressure dropping below 8.0 psi ... even if I turn on=
 the fuel pump to low =3D 9, 500=A0- 11,500 - 12,500 ????=0A=A0=0Aany ideas=
 on=A0what is going on???? Takeoff fuel pressure is=A028.0 psi ....=A0=A0=
=0A=A0=0AThanks ...=A0=0AAlan Crawford
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<html><body><div style=3D"color:#000; background-color:#fff; font-family:bo=
okman old style, new york, times, serif;font-size:12pt"><div>Just a suggest=
ion here, but maybe you should take the time to determine just what is off =
kilter. &nbsp;At 50 LOP you are right on the edge of a significant reductio=
n in power. &nbsp;I would suggest leaning beyond the 40 LOP mention until t=
he engine loses significant power. &nbsp;It shouldn't take much. &nbsp;That=
 is proof positive that you as lean as the EGT says you are. &nbsp;Given th=
at confirmation, the anomaly must be an error in the fuel pressure reading,=
 or some problem with the fuel system that allows normal mixture to be main=
tained with an abnormal fuel pressure reading. &nbsp;The engine tells the t=
ale - it can't be fooled.</div><div>Just a thought from one not too familia=
r with the Continental fuel system.</div><div>Gary Casey</div><div><br></di=
v><div><span class=3D"Apple-style-span" style=3D"color: rgb(69, 69, 69);
 font-family: arial, helvetica, sans-serif; font-size: 13px; "><div><font s=
ize=3D"4" face=3D"Marking Pen">Just started having a change in fuel pressur=
e at cruise.&nbsp; I have a Legacy ... 550N ... been cruising 40 to 60 degr=
ees lean of peak with no problem, with fuel pressure above 8.2 psi. Dependi=
ng on altitude 2500 rpm - 2300 rpm ... 11.5 to 11.8 gph ...</font></div><di=
v><font size=3D"4" face=3D"Marking Pen"></font>&nbsp;</div><div><font size=
=3D"4" face=3D"Marking Pen">The last few flights I can not get&nbsp;40 degr=
ees lean of peak at any altitude without the fuel pressure dropping below 8=
.0 psi ... even if I turn on the fuel pump to low =3D 9, 500&nbsp;- 11,500 =
- 12,500 ????</font></div><div><font size=3D"4" face=3D"Marking Pen"></font=
>&nbsp;</div><div><font size=3D"4" face=3D"Marking Pen">any ideas on&nbsp;w=
hat is going on???? Takeoff fuel pressure is&nbsp;28.0 psi ....&nbsp;&nbsp;=
</font></div><div><font size=3D"4" face=3D"Marking Pen"></font>&nbsp;</div>=
<div><font size=3D"4"
 face=3D"Marking Pen">Thanks ...&nbsp;</font></div><div><font size=3D"4" fa=
ce=3D"Marking Pen">Alan Crawford</font></div></span></div>  </div></body></=
html>
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