X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 06 Feb 2012 12:24:42 -0500 Message-ID: X-Original-Return-Path: Received: from p3plex1out02.prod.phx3.secureserver.net ([72.167.180.18] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with SMTP id 5384799 for lml@lancaironline.net; Mon, 06 Feb 2012 11:31:46 -0500 Received-SPF: none receiver=logan.com; client-ip=72.167.180.18; envelope-from=pete@leapfrogventures.com Received: (qmail 15042 invoked from network); 6 Feb 2012 16:31:11 -0000 Received: from unknown (HELO smtp.ex1.secureserver.net) (72.167.180.20) by p3plex1out02.prod.phx3.secureserver.net with SMTP; 6 Feb 2012 16:31:11 -0000 Received: from P3PW5EX1MB14.EX1.SECURESERVER.NET ([10.6.135.86]) by P3PW5EX1HT002.EX1.SECURESERVER.NET ([72.167.180.20]) with mapi; Mon, 6 Feb 2012 09:30:56 -0700 From: "pete@leapfrogventures.com" X-Original-To: "Sky2high@aol.com" , "lml@lancaironline.net" X-Original-Date: Mon, 6 Feb 2012 09:30:55 -0700 Subject: RE: [LML] Re: VM1000 MAP sensor unit question Thread-Topic: [LML] Re: VM1000 MAP sensor unit question Thread-Index: Aczkvrb1SKcU9wCERD+11m9uhEqVhAALWtFA X-Original-Message-ID: <2A14E6258A8534418F5498D73CCA51EFAAFF5535@P3PW5EX1MB14.EX1.SECURESERVER.NET> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_2A14E6258A8534418F5498D73CCA51EFAAFF5535P3PW5EX1MB14EX1_" MIME-Version: 1.0 --_000_2A14E6258A8534418F5498D73CCA51EFAAFF5535P3PW5EX1MB14EX1_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Actually, I would not use the Hoppes gun solvent on brass parts. It works = great on stainless parts, but is too caustic for brass. Folks were using t= hem on TCM injectors (which are brass), until they discovered that it had i= ssues and now they recommend MEK. I suggest using MEK and an ultrasonic cleaner. Put the MEK and the part in= a small plastic cup, and put the cup in the water in the ultrasonic cleane= r. This keeps the MEK away from the walls of the cleaner, but allows the w= aves to penetrate to the part. Pete From: Sky2high@aol.com [mailto:Sky2high@aol.com] Sent: Sunday, February 05, 2012 5:31 AM To: lml@lancaironline.net Subject: Re: [LML] Re: VM1000 MAP sensor unit question Mark, Thanks, we'll see if that does it. Scott In a message dated 2/3/2012 12:51:45 P.M. Central Standard Time, mjrav@comc= ast.net writes: Hi Scott, My graybeard mechanic recommends cleaning fuel injectors with Hoppe's gun s= olvent by soaking overnight. It works like a charm. Mark ----- Original Message ----- From: Sky2high@aol.com To: lml@lancaironline.net 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 bloc= k that is pipe thread tapped for a fitting connected to the MAP source on o= ne side and the actual pressure sensor mounted on the other side that is el= ectrically 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 d= ampens 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 s= tate the MAP indication seems correct and the actual sensor seems to be ope= rating properly. I.E. The tested pressure eventually makes it past the re= strictor. One of the ways to fix this is to clean the restrictor. Here is where I ne= ed help. Because the restrictor mesh is so fine, what chemicals and what p= rocedure is best used to clean and restore the restrictor? Should a vibrat= ing parts/jewelry cleaner be used? It cannot just be soaked and blown out. Thanks, Scott Krueger ________________________________ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.926 / Virus Database: 271.1.1/4183 - Release Date: 02/03/12 02= :34:00 --_000_2A14E6258A8534418F5498D73CCA51EFAAFF5535P3PW5EX1MB14EX1_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Actually, I= would not use the Hoppes gun solvent on brass parts.  It works great = on stainless parts, but is too caustic for brass.  Folks were using th= em on TCM injectors (which are brass), until they discovered that it had is= sues and now they recommend MEK.

=  

I suggest using = MEK and an ultrasonic cleaner.  Put the MEK and the part in a small pl= astic cup, and put the cup in the water in the ultrasonic cleaner.  Th= is keeps the MEK away from the walls of the cleaner, but allows the waves t= o penetrate to the part.

 

Pete<= o:p>

 

From: Sky2high@aol.com [mailto:Sky2h= igh@aol.com]
Sent: Sunday, February 05, 2012 5:31 AM
To: lml@lancaironline.net
Subject: Re: [LML] Re: VM1000 MAP sensor= unit question

&= nbsp;

Mark,

 

Thanks, we'll see if that does it.

 

=

Scott

 

In a message dated 2/3/2012 12:51:45 P.M. Central Standard Time, mjrav@comcast.net writes:

Hi Scott,

<= div>

 

My graybeard mechanic recommends cleaning fuel injectors wi= th Hoppe's gun solvent by soaking overnight.

It works like a charm.

 

Mark

----- Original Message -----

<= div>

From: = Sky2high@aol.com

Sent: Friday, Februar= y 03, 2012 1:10 PM

= Subject: [LML] VM1000 MAP sensor unit question<= /span>

 

The EPI 800 and VM 1000 manifold pressure = "sensor" consists of a brass block that is pipe thread tappe= d 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 t= o the VM computer.

=  

Imbedded in = the block is a porous metallic "restrictor" with the purpose= of "smoothing" rapid fluctuations in the pressure and prote= cting the fragile actual sensor.

 

If this restrictor becomes clogged with miniscule particulate, it furth= er dampens pressure changes so that the MAP indication does not change rapi= dly 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 m= akes it past the restrictor.

 

On= e 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 an= d what procedure is best used to clean and restore the restrictor= ?  Should a vibrating parts/jewelry cleaner be used?  It cannot j= ust be soaked and blown out.

 

Th= anks,

 

Scott Krueger  =


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

= --_000_2A14E6258A8534418F5498D73CCA51EFAAFF5535P3PW5EX1MB14EX1_--