Date: Mon, 14 Sep 2009 12:31:46 -0400
Reply-To: Ken Wilford <kenwilfy@COMCAST.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Ken Wilford <kenwilfy@COMCAST.NET>
Subject: Re: 1.9ltr vanagon timing help needed.
In-Reply-To: <aeea9b480909140907t64720e60x49b62146e660a702@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Tony, the timing was not the culprit. Your timing can't change unless
you change it by moving the distributor so you can't go from a good
running van to a bad one and the timing be the culprit. It would not
change on it's own. So now you have two problems, the original one and
the fact that your timing is not not set properly. The two marks you
have on your pulleys are V notch (timing mark) and U notch (TDC). I
would set your timing to about 7 deg BTDC (advanced). It should run
well there. You can do this the easiest with a timing light that has a
little dial on the back that allows you to set it to the timing you
desire then aim it at the U mark and turn the distributor until the U
mark lines up with the case halves. If you don't have one of those
measure the distance between the V mark and the U mark with a tape
measure. Now make another mark the same distance as these two marks are
apart but on the other side of the U. That should be 5 degrees advanced
which would be fine. Now time it to that using the static light with
the idle stablizer by passed and it should run as good as it is going to
run. Now you have to troubleshoot the stumbling problem which is
probably something completely different. Check out my article on
bucking and hesistating and if it helps you out.
http://www.vanagain.com/bucking1.htm
Let me know if I can help you further.
Ken Wilford
John 3:16
www.vanagain.com
T Collins wrote:
> Hello folks,
>
> I need your help. This is going to be long. So please bear with me. I have
> searched our archives and looked elsewhere in the net and I am getting many
> different and conflicting information.
>
> So lets begging shall we? This past winter my 1985 vanagon started stumbling
> at cruising speed, just a little bit. I changed the fuel filter and that
> seem to help. I also noticed some exhaust leaks, but disregarded them. At
> the beginning of this summer the van developed a serious bucking and
> stumbling issue. I checked those exhaust leaks to find out that #3 cylinder
> pipe was had crumbled all the way across. I thought that this would
> certainly have something to do with the stumbling as this leak was a giant
> crater before the O2 sensor. The J pipe also had a whole as well as the
> muffler. I have since ruled out the exhaust. All the pipes are in place
> there is no leak to be found in the back end. Yet the issue continues.
>
> I figured timing then is the culprit. Distributor cap, rotor and plugs have
> been changed. I have looked at all the information on timing for the 1.9
> starting with the bently (which looks like Greek to me) to a number of
> answer in the archives, to a vanagain news letter. I followed many of these
> and yet el guapo does not run under load worth a poop.
>
> I looked at my crank pulley closest to the block, there is V notch on it. I
> think that is TDC. On the rear pulley (closest to back of van) There is
> another notch this is one is a U shape and it is to the right of the V
> shaped one. Here is where I need clarification #1, is this 5* after top dead
> center ATDC?
>
> When I set the timing I make sure that I get the rotor, notch in the
> distributor and V notch all lined up TDC to cyl #1 to set this timing mark
> and the van does not run appropriately. I have also tried setting to the
> 5*ATDC and that is just as bad. Come to think of it both in both settings
> the marks seem to dance a bit not being constant. On road test it bucks,
> stumbles and cuts off. Can someone clarify the right timing to use.
>
> I am using a timing light without any features to it. I get my Pos from the
> alternator, my negative from the tranny bolt, and my signal from the wire to
> cyl #1.
>
> I have disconnected the idle stabilizer and plug the 2 connectors, also
> setting iddle with the adjustment screw using the tach as my guideline. I
> know that is not perfect, but I am sure that I am at 850 rpm + or - 50 rpm.
>
> I have read information that suggest that timing should be done at 15-17
> BTDC is this right? I have not tried this yet.
>
> Before there are suggestion that this is an AFM problem, I have tried 3
> including one that is known good or new. Something tells me that I need to
> get this timing right before I can move (no pun intended) forward.
>
> I know I am wordy, but I am trying to paint the whole picture. I welcome
> information from those of you who may have experienced this set of issues
> and had success solving it.
>
> Thanks,
> Tony
> --
> 82 Scirocco "Rodolfo"
> 85 Vanagon "El Guapo"
> 90 Fuji Ace
>
>
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