X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [66.219.56.253] (HELO mail.qnsi.net) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3640454 for flyrotary@lancaironline.net; Tue, 12 May 2009 20:10:57 -0400 Received-SPF: none receiver=logan.com; client-ip=66.219.56.253; envelope-from=bhughes@qnsi.net Return-Receipt-To: "Bobby J. Hughes" MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C9D367.B9557ED0" Subject: Fuel Pressure Regulator \ Vacuum Leak Disposition-Notification-To: "Bobby J. Hughes" Content-class: urn:content-classes:message Date: Tue, 12 May 2009 19:11:19 -0600 x-mimeole: Produced By Microsoft Exchange V6.5 Message-ID: <74120FDE88CAFE4DBDA8814BCE20A3F315E193@qnsi-mail.qnsi.net> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: Fuel Pressure Regulator \ Vacuum Leak thread-index: AcnTZ7j7nkSDmeukQji9zEoGNVdSiQ== From: "Bobby J. Hughes" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C9D367.B9557ED0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable I reinstalled my EC2 yesterday after a few changes by Tracy. I immediately discovered a new problem. The lowest MAP address being used was 62 and both primary and secondary injectors fired at all MP and RPM. With Tracy on the phone and Dennis H supervising my efforts we found a small vacuum leak at the Aeromotive A1000-6 fuel pressure regulator. After switching the two MP tubes between A&B controllers the A controller starter working as expected. The EC2 staged properly with lower MAP addresses being accessed. When reinstalling the EC2 I had switch the MP tubes from my usual configuration. A couple of weeks ago I had noticed my B controller was not working as expected. I had to continually adjust the mixture to keep the engine running. Now I know why. What was unexpected is one MP tube is used for the fuel pressure regulator, B Controller and my Advanced EFIS engine monitor. The Advanced engine monitor was not affected by the slight leak. On the other hand the EM3 did see the leak and was showing static pressure regardless of MP. Here is a note from the Aeromotive web site.=20 =20 =20 =20 =20 NOTE: Testing the enclosed regulator by applying air pressure or vacuum to the vacuum port with a hand-held pump will yield poor results, due to the slight air leakage through the adjustment screw threads. This minute leakage, which is typical of all adjustable fuel pressure regulators, does not, in any way, affect the performance of the regulator. =20 Bobby Hughes =20 ------_=_NextPart_001_01C9D367.B9557ED0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

I reinstalled my EC2 = yesterday after a=20 few changes by Tracy. I immediately discovered a new problem. The lowest = MAP=20 address being used was 62 and both primary and secondary injectors fired = at all=20 MP and RPM. With Tracy on the phone and Dennis H supervising my efforts = we found=20 a small vacuum leak at the Aeromotive A1000-6 fuel pressure regulator. = After=20 switching the two MP tubes between A&B controllers the A controller = starter=20 working as expected. The EC2 staged properly with lower MAP = addresses being=20 accessed. When reinstalling the EC2 I had switch the MP tubes from my = usual=20 configuration. A couple of weeks ago I had noticed my B controller was = not=20 working as expected. I had to continually adjust the mixture to keep the = engine=20 running. Now I know why. What was unexpected is one MP tube is used = for the=20 fuel pressure regulator, B Controller and my Advanced EFIS engine = monitor. The=20 Advanced engine monitor was not affected by the slight leak. On the = other hand=20 the EM3 did see the leak and was showing static pressure = regardless of=20 MP. Here is a note from the Aeromotive web site.=20

NOTE: Testing=20 the enclosed regulator by applying air pressure or vacuum to the vacuum = port=20 with a

hand-held pump will yield = poor results,=20 due to the slight air leakage through the adjustment screw

threads. This minute = leakage, which is=20 typical of all adjustable fuel pressure regulators, does not, in = any

way, affect the performance = of the=20 regulator.

Bobby=20 Hughes

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