Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.2.3) with ESMTP id 430382 for flyrotary@lancaironline.net; Fri, 24 Sep 2004 09:19:18 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.72; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20040924131843.MEPB18351.imf24aec.mail.bellsouth.net@rd> for ; Fri, 24 Sep 2004 09:18:43 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] EC2 problem Date: Fri, 24 Sep 2004 08:18:51 -0500 Message-ID: <00ff01c4a239$0b2c3a60$04000100@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0100_01C4A20F.22563260" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0100_01C4A20F.22563260 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Switching off the secondary injectors results in very rough running; = much too rich, turning mixture back to about 11:00 gets it smoothed out. =20 =20 If you're sure you're below the staging point, turning off the secondary switch should do absolutely nothing. =20 =20 Turning off the primary injector switch results in engine faltering = badly, almost as though it's running on only one of 3 rotors, changing mixture doesn't seem to help, engine will die on 4-5 seconds.=20 =20 If you're running mismatched injectors (primaries one type, and = secondaries another), then you can expect a change in mixture when turning off the primary switch. The change can be drastic enough to kill the engine. I used to have to turn the mixture knob 180 degrees to compensate for the difference between the Mazda 550's and the MSD 52 lb (525) injectors. = =20 =20 You've said that this is all just like it was on the dyno, but did you actually turn off injectors when it was on the dyno? =20 =20 I know it's not what you want to hear, but since you tried the B = controller with similar results, I would bet you've got something wired wrong. I'd = pay particular attention to the injectors, and disable switches. I would = pull off the EC-2 connector, and the injector connectors, and use an ohmmeter = to make sure the injector signal pins go to the correct injectors. I'd = also verify that the injector power from the disable switches goes only to = the proper injectors. In other words, primary power only to the primary injectors, and the same for secondary. Finally, with NO power being put = on the EC-2 wiring, I'd ohm the pins of the plug for shorts. In other = words, put one lead of an ohmmeter on a pin of the plug, then touch the other = lead to every pin around that pin, particularly the ones next to it on the = same row. It's very easy to get a solder bridge between a couple pins, and = that could cause some very unpredictable behavior, depending on what gets = shorted together. =20 =20 Questions-=20 =20 Does the cold start switch function normally? Since this is used with = the injector disable switch, it could cause problems if it's not working properly. =20 =20 Have you tried the disable switches above the staging point? =20 =20 Good luck, Rusty (enjoying the dry spell, since it will be 4 months before I get a = new roof) =20 =20 ------=_NextPart_000_0100_01C4A20F.22563260 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Switching off the = secondary=20 injectors results in very rough running; much too rich, turning mixture = back to=20 about 11:00 gets it=20 smoothed out.  
 

If you're sure=20 you're below the staging point, turning off the secondary switch = should do=20 absolutely nothing. 

 

Turning off the primary = injector=20 switch results in engine faltering badly, almost as though it’s = running on only=20 one of 3 rotors, changing mixture doesn’t seem to help, engine = will die on 4-5=20 seconds. 

 

If you're running=20 mismatched injectors (primaries one type, and secondaries another), then = you can=20 expect a change in mixture when turning off the primary switch.  = The change=20 can be drastic enough to kill the engine.  I used to have to turn = the=20 mixture knob 180 degrees to compensate for the difference between the = Mazda=20 550's and the MSD 52 lb (525)=20 injectors.      

&nbs= p;

You've = said that this=20 is all just like it was on the dyno, but did you actually turn off = injectors=20 when it was on the=20 dyno?   

&nbs= p;

I know = it's not what=20 you want to hear, but since you tried the B controller with similar = results, I would bet you've got something wired wrong.  = I'd pay=20 particular attention to the injectors, and disable = switches.  I would=20 pull off the EC-2 connector, and the injector connectors, and use an = ohmmeter to=20 make sure the injector signal pins go to the correct injectors.  = I'd also=20 verify that the injector power from the disable switches goes only to = the proper=20 injectors.  In other words, primary power only to the primary = injectors,=20 and the same for secondary.  Finally, with NO power being put on = the EC-2=20 wiring, I'd ohm the pins of the plug for shorts.  In other words, = put one=20 lead of an ohmmeter on a pin of the plug, then touch the other lead to = every pin=20 around that pin, particularly the ones next to it on the same row.  = It's=20 very easy to get a solder bridge between a couple pins, and that could = cause=20 some very unpredictable behavior, depending on what gets shorted = together. =20

&nbs= p;

Questions-=20

&nbs= p;

Does the = cold start=20 switch function normally?   Since this is used with = the injector=20 disable switch, it could cause problems if it's not working=20 properly.  

&nbs= p;

Have = you tried=20 the disable switches above the staging = point?    

&nbs= p;

Good=20 luck,

Rusty = (enjoying the=20 dry spell, since it will be 4 months before I get a new=20 roof)

 

 

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