X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 03 Feb 2012 13:51:12 -0500 Message-ID: X-Original-Return-Path: Received: from qmta13.westchester.pa.mail.comcast.net ([76.96.59.243] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with ESMTP id 5381886 for lml@lancaironline.net; Fri, 03 Feb 2012 13:50:31 -0500 Received-SPF: pass receiver=logan.com; client-ip=76.96.59.243; envelope-from=mjrav@comcast.net Received: from omta12.westchester.pa.mail.comcast.net ([76.96.62.44]) by qmta13.westchester.pa.mail.comcast.net with comcast id VWjh1i0020xGWP85DWpz0s; Fri, 03 Feb 2012 18:49:59 +0000 Received: from mjr ([66.30.31.1]) by omta12.westchester.pa.mail.comcast.net with comcast id VWpy1i00601T6pe3YWpyUv; Fri, 03 Feb 2012 18:49:59 +0000 X-Original-Message-ID: <002401cce2a5$0bc590c0$6701a8c0@mjr> From: "Mark Ravinski" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] VM1000 MAP sensor unit question X-Original-Date: Fri, 3 Feb 2012 13:52:57 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0021_01CCE27B.22BB8070" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.2001 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.2001 This is a multi-part message in MIME format. ------=_NextPart_000_0021_01CCE27B.22BB8070 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Scott, My graybeard mechanic recommends cleaning fuel injectors with Hoppe's = gun solvent by soaking overnight. It works like a charm. Mark ----- Original Message -----=20 From: Sky2high@aol.com=20 To: lml@lancaironline.net=20 Sent: Friday, February 03, 2012 1:10 PM Subject: [LML] VM1000 MAP sensor unit question The EPI 800 and VM 1000 manifold pressure "sensor" consists of a brass = block that is pipe thread tapped for a fitting connected to the MAP = source on one side and the actual pressure sensor mounted on the other = side that is electrically connected to the VM computer. Imbedded in the block is a porous metallic "restrictor" with the = purpose of "smoothing" rapid fluctuations in the pressure and protecting = the fragile actual sensor. If this restrictor becomes clogged with miniscule particulate, it = further dampens pressure changes so that the MAP indication does not = change rapidly as pressure rises or hardly at all as the pressure drops. = At some steady state the MAP indication seems correct and the actual = sensor seems to be operating properly. I.E. The tested pressure = eventually makes it past the restrictor. One of the ways to fix this is to clean the restrictor. Here is where = I need help. Because the restrictor mesh is so fine, what chemicals and = what procedure is best used to clean and restore the restrictor? Should = a vibrating parts/jewelry cleaner be used? It cannot just be soaked and = blown out. Thanks, Scott Krueger =20 -------------------------------------------------------------------------= ----- No virus found in this incoming message. Checked by AVG - www.avg.com=20 Version: 9.0.926 / Virus Database: 271.1.1/4183 - Release Date: = 02/03/12 02:34:00 ------=_NextPart_000_0021_01CCE27B.22BB8070 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Scott,
 
My graybeard mechanic recommends cleaning fuel injectors with = Hoppe's gun=20 solvent by soaking overnight.
It works like a charm.
 
Mark
----- Original Message -----
From:=20 Sky2high@aol.com=20
Sent: Friday, February 03, 2012 = 1:10=20 PM
Subject: [LML] VM1000 MAP = sensor unit=20 question

The EPI 800 and VM 1000 manifold pressure "sensor" consists of a = brass=20 block that is pipe thread tapped for a fitting connected to the=20 MAP source on one side and the actual pressure sensor mounted on = the=20 other side that is electrically connected to the VM computer.
 
Imbedded in the block is a porous metallic "restrictor" with = the=20 purpose of "smoothing" rapid fluctuations in the pressure and = protecting=20 the fragile actual sensor.
 
If this restrictor becomes clogged with miniscule particulate, it = further=20 dampens pressure changes so that the MAP indication does not change = rapidly as=20 pressure rises or hardly at all as the pressure drops.  At some = steady=20 state the MAP indication seems correct and the actual sensor seems to = be=20 operating properly.  I.E.  The tested pressure eventually = makes it=20 past the restrictor.
 
One of the ways to fix this is to clean the restrictor.  = Here is=20 where I need help.  Because the restrictor mesh is so fine, what=20 chemicals and what procedure is best used to clean = and restore the=20 restrictor?  Should a vibrating parts/jewelry cleaner be = used?  It=20 cannot just be soaked and blown out.
 
Thanks,
 
Scott Krueger  


No virus found in this incoming message.
Checked by AVG = -=20 www.avg.com
Version: 9.0.926 / Virus Database: 271.1.1/4183 - = Release=20 Date: 02/03/12 02:34:00
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