Date: Fri, 28 Dec 2007 11:40:38 -0800
Reply-To: David Kao <dtkao0205@YAHOO.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: David Kao <dtkao0205@YAHOO.COM>
Subject: Re: Yet Even More About My Injectors
In-Reply-To: <122820071433.27888.4775095400044CCE00006CF02214756402CECFCFCD9F9D0EBCB6@comcast.net>
Content-Type: text/plain; charset=iso-8859-1
I have a set of spare injectors pulled from an 1.9 WXBer. I just did a measure
of the resistance between the two leads of one injector. I got a value of 15 ohms.
If you use a x1k range of an analog VOM meter to measure it you would likely
to see a zero (actually almost zero) reading on your meter. You should use x1
range to measure it.
In my opinion it's very unlikely all 4 injectors are defective or clogged at
the same time. As long as there is one not defective nor clogged your engine
will give a kick in some way. In my opinion you have other problems, perhaps
an ECU problem. AFM or ignition are among other possibilities. I did not follow
all older posts of this thread. These may have all been discussed.
Inside the ECU there is a solid state switch (a bipolar transistor or a MOSFET)
that controls all 4 injectors. If the switch is turned on all 4 injectors will
spray fuel at the same time if proper fuel pressure exists. If the solid state
switch is defective the injectors will not spray any fuel. I don't think you
can use a test light thing to check the switch. Do not short the leads of any
injector. It can cause the solid state switch to burn out. Last time I opened
my ECU box I saw 3 power transistors (or MOSFETs) on a same heat sink. One of
them is the switch. I got the impression that it is a FET (or MOSFET). I checked
all three with my Triplett VOM meter and could not determine one out of the three
what it was. My Triplett usually can determine if a bipolar transistor is good
or not. But it would be not obvious on FETs.
Your fuel filter was probably clogged over a long period of time. The low fuel
situation made it worse. Now that it is replaced it should be fine.
Good luck.
David
> -------------- Original message --------------
> From: Vdub Guy <fonman4277@COMCAST.NET>
>
> > Sorry folks,
> > Are yoyu getting sick of my posts this week? Trust me, I'm getting sick of
> > asking questions about this!! It was suggested to me that I check the injectors
> > with a VOM to see if they are shorted out. Took both my digital and analog
> > meters and checked. Analog meter set to 1K, touch leads together and needle pegs
> > to zero-touch leads to injectors-meter pegs to zero. Sooooooo, does this mean
> > that I received the injectors back shorted out, I installed them, turned the key
> > and blew out my Euro spec ECU? Then hours later put my original ECU back in and
> > blew it too? I hope not. Anybody in N. Virginia willing to let me plug my ECU's
> > into their (1.9) Vanagons and see if they are any good? If the ECU's are in fact
> > ruined, I have a decision to make. I have a Subaru 2.2 I was going to put into
> > the Vanagon, last thing thing was saving up the $$ to have Tom Shiels modify the
> > harness. I can't afford another ECU. Well, I can, but I don't see the sense in
> > pouring more money into it at this point. N
> > ow, when I bought this Vanagon 15 months ago it had a seized engine. First
> > thought was a Subaru conversion, but I found a 2.1 and followed Jim Thompson's
> > write up and put it in using the Digijet injection. It ran beautifully, so well,
> > in fact that I thought the hell with the Subaru conversion. Then I ran it low on
> > fuel coming back from Everybus in April-VERY low. After filling up, I barely
> > made it home. Found the fuel filter totally clogged. Replaced that and it was
> > running again-but it never had the power it did originally. Changed out the fuel
> > filter again a month ago, but it was clean. That led me to think that the
> > injectors may be the problem. Sent them off to be cleaned and sure enough they
> > come back with a report showing 3 of the 4 were in bad shape. Great, I thought,
> > this had to be were my lost power was. Christmas day I put my newly cleaned
> > injectors back in, eagerly anticipating taking it for a drive-now here I am with
> > a dead Vanagon. Wish I had it back with the low power!
> > Jeff
> >
> > PS- I don't want this message to start a debate about the merits of the Subaru
> > conversion!
>
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