X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [64.129.170.194] (HELO VIRCOM1.fcdata.private) by logan.com (CommuniGate Pro SMTP 5.4.1) with ESMTP id 5123420 for flyrotary@lancaironline.net; Tue, 13 Sep 2011 18:39:02 -0400 Received-SPF: none receiver=logan.com; client-ip=64.129.170.194; envelope-from=cbarber@texasattorney.net Received: from FCD-MAIL06.FCDATA.PRIVATE ([fe80::697f:d6aa:b87:78d8]) by FCD-MAIL05.FCDATA.PRIVATE ([fe80::809d:a06e:5913:452e%13]) with mapi id 14.01.0323.003; Tue, 13 Sep 2011 17:38:02 -0500 From: Chris Barber To: Rotary motors in aircraft Subject: RE: [FlyRotary] EM2 problems Thread-Topic: [FlyRotary] EM2 problems Thread-Index: AQHMcmSIvkrV2uE15kyjtu9bt2ymHpVL5USi Date: Tue, 13 Sep 2011 22:37:52 +0000 Message-ID: <2D41F9BF3B5F9842B164AF93214F3D30A160F050@FCD-MAIL06.FCDATA.PRIVATE> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [69.148.239.2] Content-Type: multipart/alternative; boundary="_000_2D41F9BF3B5F9842B164AF93214F3D30A160F050FCDMAIL06FCDATA_" MIME-Version: 1.0 --_000_2D41F9BF3B5F9842B164AF93214F3D30A160F050FCDMAIL06FCDATA_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable OH, and when I use my handy dandy hand held thermal gage from HF, I am gett= ing the same temp as the reading when the engine is not ruining, thus somet= hing is happening when I start up. OH, btw my engine is not overheating. = Like I mentioned, even at 100 degree days, the temps are down significantly= ...it is the EM2 readings that are off....unless I can run my engine at 27= 0 degrees with no boil over. Other than this, currently the engine is running GREAT. (yeah, I know, famo= us last words....especially with my history....DOH!) Chris ________________________________ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of = Chris Barber [cbarber@texasattorney.net] Sent: Tuesday, September 13, 2011 5:28 PM To: Rotary motors in aircraft Subject: [FlyRotary] EM2 problems I have posted in the past with problems regarding my EM2 giving me wildly i= nconsistent reading with my EGT's. The reading flash to randomly increasing= numbers up to readings of 9000 degrees. I replaced the EGT sensors and al= l wires/thermal couplers to the EGT to no avail. The consensus has been "n= oise" especially since the EGT are so low voltage. I have now run the wire= rs along the outside to the plane away from all other wires and still no jo= y. NOW, I am having strange readings with the coolant temperature. I have not= changed anything, no movement of wires etc...well, at first, I have now re= placed the sender with no change. What seems to be happening is that when = the engine is not running, the coolant temperature seems about right (which= is pretty close to the oil temp....my oil temps dropped quite a bit after = finally getting my oil pressure up with a new front cover O-ring). HOWEVER= , when I start up the engine the coolant temperature reading shoots up anyw= here from 50 to 100 degrees higher than before I start and/or immediately a= fter I shut down (thus not enough time to cool). It is also about the same= amount higher than the oil reading. I have removed the wire from the bund= led harness to minimize interference. I am suddenly also having an issue with the coolant pressure reading flashi= ng to "N" intermittingly (I am guessing similiar to the NOP on the tach). = I too have checked the wires. Nothing has been changed, the coolant temp a= nd pressure just started happening...the EGT has always been a problem. Ag= ain, I have now replaced all the sening units and wires. Ok, while the EGT may be somewhat secondary in use, the coolant temperature= is not. I have tried various wires. Moved wires and replaced all sensors= and re-did D-sub pins. Thoughts? I am about two minutes away from ordering the Dynon engine monitor( which I= intend to buy eventually anyway), however, I am not thrilled at the idea = of throwing money at what may be a simple fix...and may still have problems= with even with the new unit. Thanks. Chris --_000_2D41F9BF3B5F9842B164AF93214F3D30A160F050FCDMAIL06FCDATA_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

OH, and when I use my handy dandy hand held thermal gage fro= m HF, I am getting the same temp as the reading when t= he engine is not ruining, thus something is happening when I start u= p.  OH, btw my engine is not overheating.  Like I mentioned, even at 100 degree days, the temps are down significantl= y ...it is the EM2 readings that are off....unles= s I can run my engine at 270 degrees with no boil over.

 

Other than this, currently the engine is running GREAT. (yeah, I know, f= amous last words....especially with my history....DOH!)

 

Chris

From: Rotary motors in aircraft [flyrotary= @lancaironline.net] on behalf of Chris Barber [cbarber@texasattorney.net] Sent: Tuesday, September 13, 2011 5:28 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] EM2 problems

I have posted in the past with problems regarding my EM2<= /a> giving me wildly inconsistent reading with my EGT's<= a>. The reading flash to randomly increasing numbers= up to readings of 9000 degrees.  I replaced the EGT= sensors and all wires/thermal couplers to the EGT to no avail.  The consensus has been "noise" especi= ally since the EGT are so low voltage.  I ha= ve now run the wirers along the outside to the plane away from all other wires and still no joy.

 

NOW, I am having strange readings with the coolant temperature.&nbs= p; I have not changed anything, no movement of wires etc...well, at first, = I have now replaced the sender with no change.  What seems to be happe= ning is that when the engine is not running, the coolant temperature seems about right (which is pretty close to the oil te= mp....my oil temps dropped quite a bit after finally = getting my oil pressure up with a new front cover O-ring).  HOWEV= ER, when I start up the engine the coolant temperature reading shoots up anywhere from 50 to 100 degrees higher than before I start = and/or immediately after I shut down (thus not enough time to c= ool).  It is also about the same amount higher= than the oil reading.  I have removed the wire from the bundled harness to minimize interference.

 

I am suddenly also having an issue with the coolant pressure reading fla= shing to "N" intermittingly (I am guessing similiar t= o the NOP on the tach).  I too have c= hecked the wires.  Nothing has been changed, the coolant temp and pressure just started happening...the EGT has always = been a problem.  Again, I have now replaced all the sening= units and wires.

 

Ok, while the EGT may be somewhat secondary in= use, the coolant temperature is not.  I have tried various wires.&nbs= p; Moved wires and replaced all sensors and re-did D-sub pins. 

 

Thoughts?

 

I am about two minutes away from ordering the Dynon engine monitor( which I intend to buy eventually anyway), however,&nb= sp; I am not thrilled at the idea of throwing money at what may be a s= imple fix...and may still have problems with even with the new unit.

 

Thanks.

 

Chris

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