X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost02.isp.att.net ([204.127.217.102] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5475586 for flyrotary@lancaironline.net; Tue, 10 Apr 2012 11:23:52 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.102; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-98-85-145-87.mco.bellsouth.net[98.85.145.87]) by isp.att.net (frfwmhc02) with SMTP id <20120410152315H02007r7qre>; Tue, 10 Apr 2012 15:23:16 +0000 X-Originating-IP: [98.85.145.87] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: Mixture graph on EM-2 Date: Tue, 10 Apr 2012 11:23:19 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01CD170C.553BA0F0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Ac0XH3GLNJ2ro3FTRsKZ9D7XEBPHAAADXAog X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_0009_01CD170C.553BA0F0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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 turned on. It is not affected by removing the O2 sensor from the exhaust so that 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't think that it is coming from the sensor since it is the same when 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 ------=_NextPart_000_0009_01CD170C.553BA0F0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

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 turned on. It is not affected by removing the O2 = sensor from the exhaust so that 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’t think that it is coming from the sensor since = it is the same when 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

------=_NextPart_000_0009_01CD170C.553BA0F0--