X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-fx0-f52.google.com ([209.85.161.52] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with ESMTPS id 5123425 for flyrotary@lancaironline.net; Tue, 13 Sep 2011 18:45:50 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.161.52; envelope-from=msteitle@gmail.com Received: by fxe23 with SMTP id 23so923296fxe.25 for ; Tue, 13 Sep 2011 15:45:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=uA1DNYUc0OpeK2C3H2zQLm/XJACOCUF/+gnsrb1uB3I=; b=dsUOaYPOb24x0XldSiMc2v/nc9O9EsyDBW7ZkZwLNpIgflL4A8SBS7as+RWZgcE2uT fhjLQNWZmjTep1eh/wZc7WHZ0HkwN2MiqU6ND1LFQJ+f6Te+S0AVcJ0p/xoIXMaq2dXo 9aiBhjnFmh2/NJ1SunFdwNtrhFNYIv5NL5AkY= MIME-Version: 1.0 Received: by 10.223.48.141 with SMTP id r13mr396564faf.115.1315953913472; Tue, 13 Sep 2011 15:45:13 -0700 (PDT) Received: by 10.223.87.77 with HTTP; Tue, 13 Sep 2011 15:45:13 -0700 (PDT) In-Reply-To: References: Date: Tue, 13 Sep 2011 17:45:13 -0500 Message-ID: Subject: Re: [FlyRotary] Re: EM2 problems From: Mark Steitle To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=000e0cd1d7788da8d904acda65fd --000e0cd1d7788da8d904acda65fd Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Chris, Have you spoken with Tracy? I suspect he will have some good suggestions. My guess is wiring, especially in relation to the H2O sensor. I would tak= e a real close look at the EM-2 d-sub connector for solder bridges or cold solder joints. Also, I would check ground between the EM-2, engine and battery with an ohm-meter. And finally, I would double check that somethin= g isn't cross-wired. Mark S. On Tue, Sep 13, 2011 at 5:37 PM, Chris Barber wr= ote: > OH, and when I use my handy dandy hand held thermal gage from HF, I am > getting the same temp as the reading when the engine is not ruining, thus > something is happening when I start up. OH, btw my engine is not > overheating. Like I mentioned, even at 100 degree days, the temps are do= wn > significantly ...it is the EM2 readings that are off....unless I can run > my engine at 270 degrees with no boil over. > > > > Other than this, currently the engine is running GREAT. (yeah, I know, > famous last words....especially with my history....DOH!) > > > > Chris > > ------------------------------ > > *From:* Rotary motors in aircraft [flyrotary@lancaironline.net] on behal= f > 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 inconsistent reading with my EGT's. The reading flash to randomly > increasing numbers up to readings of 9000 degrees. I replaced the EGTsen= sors and all wires/thermal couplersto the EGTto no avail. The consensus ha= s been "noise" especially since the EGTare so low voltage. I have 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. I have n= ot > changed anything, no movement of wires etc...well, at first, I have now > replaced the sender with no change. What seems to be happening is that w= hen > the engine is not running, the coolant temperature seems about right (whi= ch > 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 temperatu= re > reading shoots up anywhere from 50 to 100 degrees higher than before I st= art > and/or immediately after I shut down (thus not enough time to cool). It > is also about the same amount higher than the oil reading. I have remove= d > the wire from the bundled harness to minimize interference. > > > > I am suddenly also having an issue with the coolant pressure reading > flashing 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 and pressure just started happening...the EGT has always bee= n > 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. Moved wires and replace= d > 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 id= ea > of throwing money at what may be a simple fix...and may still have proble= ms > with even with the new unit. > > > > Thanks. > > > > Chris > --000e0cd1d7788da8d904acda65fd Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Chris,=A0

Have you spoken with Tracy? =A0I suspect he wi= ll have some good suggestions. =A0My guess is wiring, especially in relatio= n to the H2O sensor. =A0I would take a real close look at the EM-2 d-sub co= nnector for solder bridges or cold solder joints. =A0Also, I would check gr= ound between the EM-2, engine and battery with an ohm-meter. =A0And finally= , I would double check that something isn't cross-wired. =A0

Mark S. =A0 =A0

On Tu= e, Sep 13, 2011 at 5:37 PM, Chris Barber <cbarber@texasattorney.net> w= rote:

OH, and when I use my handy dandy hand held=A0thermal gage from H= F, I am getting the same temp as the reading when the = engine is not ruining, thus something is happening when I start up.= =A0 OH, btw my engine is not overheating.=A0 Like I mentioned, even at 100 degree days, the temps are down significantl= y ...it is the=A0EM2 readings that are off....unless I= can run my engine at 270 degrees with no boil over.

=A0

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

=A0

Chris

From: Rotary motors in aircraft [flyrotary@lancaironline.net] on beha= lf 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=A0EM2= giving me wildly=A0inconsistent reading with my EGT's= . The reading flash to=A0randomly increasing numbers up t= o readings=A0of 9000 degrees.=A0=A0I replaced the=A0EGT sensors and all wires/thermal couplers to the=A0EGT to no avail.=A0 The consensus has been "noise" especially s= ince the=A0EGT are so low voltage.=A0 I have now run t= he wirers along the outside to the plane away from all other wires and still no joy.

=A0

NOW, I am having strange readings=A0with the coolant temperature.=A0 I h= ave not changed anything, no movement of wires etc...well, at first, I have= now replaced the sender with no change.=A0 What seems to be happening is t= hat 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=A0quite a bit=A0after=A0finally getting m= y oil pressure up with a new front cover=A0O-ring).=A0 HOWEVER, when I star= t up the engine the coolant temperature reading shoots up anywhere from 50 to 100 degrees higher than=A0before I start and= /or=A0immediately after I shut down (thus not enough time to cool).= =A0 It is also about the same=A0amount=A0higher= than the oil reading.=A0 I have removed the wire from the bundled harness to minimize interference.

=A0

I am suddenly also having an issue with the coolant pressure reading fla= shing to "N" intermittingly (I am guessing=A0similiar to t= he=A0NOP on the tach).=A0 I too have checked th= e wires.=A0 Nothing has been changed, the coolant temp and pressure just started happening...the=A0EGT has always bee= n a problem.=A0 Again, I have now replaced all the=A0sening units an= d wires.

=A0

Ok, while the=A0EGT may be somewhat secondary in us= e, the coolant temperature is not.=A0 I have tried various wires.=A0 Moved = wires and replaced all sensors and re-did D-sub pins.=A0

=A0

Thoughts?

=A0

I am about two minutes away from ordering the=A0Dynon engine monitor( which I intend to buy eventually anyway), however,=A0 I = am not thrilled at the=A0idea of throwing money at what may be a simple fix= ...and may still have problems with even with the new unit.

=A0

Thanks.

=A0

Chris


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