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Date: Fri, 18 Sep 2009 16:57:05 -0400
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Message-ID: <1b4b137c0909181357x29d7940fp5ec6e057eb0cdac9@mail.gmail.com>
Subject: Re: [FlyRotary] Mixture Condition
From: Tracy Crook <tracy@rotaryaviation.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary=000feaf0634ceb6dca0473e05ffd

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With such an odd assortment of symptoms I suspect that you may have more
than one problem.  This is the hardest situation to diagnose because fixing
any one thing will not make it right, only change the symptoms.

If there IS a single problem, it is to be found by finding what makes the
engine run with all injectors disabled.  This *can't* happen unless there is
a major problem somewhere.  I would suggest fixing this first.

Tracy Crook

On Fri, Sep 18, 2009 at 1:08 PM, John <downing.j@sbcglobal.net> wrote:

>  I have narrowed the mixture condition down to the fact that when it
> starts to miss up I can keep it running poorly by turning the mixture
> control down to minimum, but if I turn off the primary injectors switch the
> engine appears to run okay, the secondary injector switch doesn't seem to
> make any difference in the way it runs at 4000 rpm or idle.  The injector
> switches as well as the wiring harness I purchased from Bob and all wires
> are soldered and covered with heat shrink.  I checked the best I can with a
> light and mirror and everything looks okey under the panel.  It runs the
> same, rather in mode A or B.  On rereading the instructions I see that the
> coil disable can only be checked in mode B, so I haven't done that yet.
> I turned of the fuel pump and with the injector switch's off the engine
> continued to run until the fuel press was down to 17 pds. and quit.  I
> turned on the fuel pump (LP) to the Weber and it started immediatly.  This
> condition started at 7.2 on the hour meter.  I really now don't have any
> idea where to start looking for the problem.  JohnD
>

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With such an odd assortment of symptoms I suspect that you may have more th=
an one problem.=A0 This is the hardest situation to diagnose because fixing=
 any one thing will not make it right, only change the symptoms.<br><br>If =
there IS a single problem, it is to be found by finding what makes the engi=
ne run with all injectors disabled.=A0 This <u>can&#39;t</u> happen unless =
there is a major problem somewhere.=A0 I would suggest fixing this first.=
=A0 <br>
<br>Tracy Crook<br><br><div class=3D"gmail_quote">On Fri, Sep 18, 2009 at 1=
:08 PM, John <span dir=3D"ltr">&lt;<a href=3D"mailto:downing.j@sbcglobal.ne=
t">downing.j@sbcglobal.net</a>&gt;</span> wrote:<br><blockquote class=3D"gm=
ail_quote" style=3D"border-left: 1px solid rgb(204, 204, 204); margin: 0pt =
0pt 0pt 0.8ex; padding-left: 1ex;">






<div bgcolor=3D"#ffffff">
<div><font face=3D"Arial" size=3D"2">I have narrowed the mixture condition =
down to the=20
fact that when it starts to miss up I can keep it running poorly by turning=
 the=20
mixture control down to minimum, but if I turn off the primary injectors sw=
itch=20
the engine=A0appears to=A0run okay, the secondary injector switch doesn&#39=
;t=20
seem to make any difference in the way it runs at 4000 rpm or idle.=A0 The=
=20
injector switches as well as the wiring harness I purchased from Bob and al=
l=20
wires are soldered and covered with heat shrink.=A0 I checked the best I ca=
n=20
with a light and mirror and everything looks okey under the panel.=A0 It ru=
ns=20
the same, rather in mode A or B.=A0 On rereading the instructions I see tha=
t=20
the coil disable can only be checked in mode B, so I haven&#39;t done that=
=20
yet.=A0 </font></div>
<div><font face=3D"Arial" size=3D"2">I turned of the fuel pump and with the=
 injector=20
switch&#39;s off the engine continued to run until the fuel press was down =
to 17=20
pds. and quit.=A0 I turned on the fuel pump (LP) to the Weber and it starte=
d=20
immediatly.=A0 This condition started at 7.2 on the hour meter.=A0 I=20
really now don&#39;t have any idea where to start looking for the problem.=
=A0=20
JohnD=A0 </font></div></div>
</blockquote></div><br>

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