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[166.248.135.106]) by mx.google.com with ESMTPS id bm15sm8853388qab.17.2012.04.11.18.15.12 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 11 Apr 2012 18:15:13 -0700 (PDT) Subject: Re: [FlyRotary] Re: Mixture graph on EM-2 References: From: Tracy Content-Type: multipart/alternative; boundary=Apple-Mail-37--596172986 X-Mailer: iPad Mail (8F191) In-Reply-To: Message-Id: <5B138826-D8B7-4EE2-9136-D01BC3F9544E@gmail.com> Date: Wed, 11 Apr 2012 21:15:09 -0400 To: Rotary motors in aircraft Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (iPad Mail 8F191) --Apple-Mail-37--596172986 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Hi Bill, My cabin in Colorado is off-grid and I have no means to work on electr= onics out here so it will be May 8th before I can look at it. Tracy Sent from my iPad On Apr 11, 2012, at 5:48 PM, "Bill Bradburry" wro= te: > Tracy, > =20 > The mixture function was working fine last June. My mother in law fell an= d airplane stuff went by the way side until I was going to fly it last Janua= ry. That is when the mixture graph went south (north actually since it went= up :>)) > =20 > I will trace out the wire and ensure that it does in fact go to P2-8, but i= t looks like I will need to send it in. Do you have to return from Colorado= before it can be repaired? > =20 > B2 > =20 > From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Be= half Of Tracy > Sent: Wednesday, April 11, 2012 2:04 PM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: Mixture graph on EM-2 > =20 > Two possibilities: > 1. The EM2 is not working on the mixture function > 2. There is a miswire and the O2 input is not really connected where you= think it is. > =20 > Only you are in a position to find out which it is. > =20 > Tracy >=20 > Sent from my iPad >=20 > On Apr 11, 2012, at 1:41 PM, "Bill Bradburry" w= rote: >=20 >> Tracy, >> =20 >> Yesterday when I taxied the plane around to the hangar from the paint sho= p, the mixture graph was maxed out. Today, the mixture graph is in the cent= er (8 of 16 bars lit) with the engine not running. I removed the O2 sensor s= o it was not grounded, no change, I disconnected the wire to the O2 sensor, n= o change, I then hooked up a wire from the sensor input to ground, no change= ! >> =20 >> New update: Today with the sensor input grounded and the mixture bar at m= idscale, I turned on the fuel pump. The fuel pressure went to 40 lbs, the f= uel bar graph went to 2 bars above mid-scale, and the mixture graph pegged o= ut at the top. This happened with the mixture input grounded. All of the ot= her indications looked normal. I think this means there is an internal prob= lem with the EM-2. Are there other tests that you recommend? >> =20 >> Thank you, >>=20 >> Bill B >> =20 >> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On B= ehalf Of Tracy >> Sent: Tuesday, April 10, 2012 1:07 PM >> To: Rotary motors in aircraft >> Subject: [FlyRotary] Re: Mixture graph on EM-2 >> =20 >> Hi Bill, >> First, be aware that O2 sensors do not work properly when cold so the rea= ding means nothing when the engine is not running. >> =20 >> Try this test: Connect the o2 sensor connection to ground and see what= the monitor indicates. It should be at minimum or no reading at all. Or= , you could start the engine and see what happens. Tell me what happens. >> =20 >> Tracy >>=20 >> Sent from my iPad >>=20 >> On Apr 10, 2012, at 11:23 AM, "Bill Bradburry" = wrote: >>=20 >>> Hi Tracy, >>> =20 >>> I talked with you several weeks ago about my mixture graph going to max a= nd staying there. I just got the plane out of the paint shop and started tr= ying to look at the problem.=20 >>> =20 >>> The graph stays maxed out and stays there when the power is turned on. I= t is not affected by removing the O2 sensor from the exhaust so that it is n= ot grounded. This is all when the engine is not running and is cold. What a= re the failure modes that could cause this? I don=E2=80=99t think that it i= s coming from the sensor since it is the same when it is cold and ungrounded= . >>> =20 >>> I know you mentioned bad grounds before, but I can find nothing wrong wi= th grounds. Everything else works that I know of. >>> =20 >>> Ideas please! >>> =20 >>> Bill B >>=20 >=20 --Apple-Mail-37--596172986 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8
Hi Bill,
     &= nbsp;My cabin in Colorado is off-grid and I have no means to work on electro= nics out here so it will be May 8th before I can look at it.

<= /div>
Tracy

Sent from my iPad

On Apr 11, 2012, at 5= :48 PM, "Bill Bradburry" <bbr= adburry@bellsouth.net> wrote:

Tracy,

 

The mixture function was working fine l= ast June.  My mother in law fell and airplane stuff went by the way side un= til I was going to fly it last January.  That is when the mixture graph wen= t south (north actually since it went up :>))

 

I will trace out the wire and ensure th= at it does in fact go to P2-8, but it looks like I will need to send it in.&nbs= p; Do you have to return from Col= orado before it can be repaired?

 

B2

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy
Sent: Wednesday, April 11, 20= 12 2:04 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Mixt= ure graph on EM-2

 

Two possibilities:

1.  The EM2 is not working on the mixture function

2.   There is a miswire and the O2 input is not really connecte= d where you think it is.

 

Only you are in a position to find out which it is.

 

Tracy

Sent from my iPad


On Apr 11, 2012, at 1:41 PM, "Bill Bradburry" <bbradburry@bel= lsouth.net> wrote:

Tracy,

 <= /o:p>

Yesterday when I taxied the plane aroun= d to the hangar from the paint shop, the mixture graph was maxed out.  To= day, the mixture graph is in the center (8 of 16 bars lit) with the engine not running.  I removed the O2 sensor so it was not grounded, no change, I disconnected the wire to the O2 sensor, no change, I then hooked up a wire f= rom the sensor input to ground, no change!=

 <= /o:p>

New update:  Today with the sensor= input grounded and the mixture bar at midscale, I turned on the fuel pump.  The fuel pressure went to 40 lbs, the fuel bar graph went to 2 b= ars above mid-scale, and the mixture graph pegged out at the top.  This happened with the mixture input grounded. All of the other indications looke= d normal.  I think this means there is an internal problem with the EM-2.  Are there other tests that you recommend?

 <= /o:p>

Thank you,


Bill B

 <= /o:p>

From: Rotary motors in aircraft= [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy
Sent: Tuesday, April 10, 2012= 1:07 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Mixt= ure graph on EM-2

 

Hi Bill,

First, be aware that O2 sensors do not work properly when cold so th= e reading means nothing when the engine is not running.

 

Try this test:    Connect the o2 sensor connection to grou= nd and see what the monitor indicates.   It should be at minimum or no reading at all.   Or,  you could start the engine and see what happens.   Tell me what happens.<= /p>

 

Tracy

Sent from my iPad


On Apr 10, 2012, at 11:23 AM, "Bill Bradburry" <bbradburry@bellsouth.net> wrote= :

Hi Tracy,

=

 

I talked with you several weeks ago about my mixture graph going= to max and staying there.  I just got the plane out of the paint shop and started trying to look at the problem. 

 

The graph stays maxed out and stays there when the power is turn= ed on.  It is not affected by removing the O2 sensor from the exhaust so t= hat it is not grounded.  This is all when the engine is not running and is cold.  What are the failure modes that could cause this?  I don=E2=80=99t think that it is coming from the sensor since it is the same w= hen it is cold and ungrounded.

 

I know you mentioned bad grounds before, but I can find nothing wrong with grounds.  Everything else works that I know of.=

 

Ideas please!=

 

Bill B

= --Apple-Mail-37--596172986--