Date: Wed, 21 Aug 2002 22:26:34 -0500
Reply-To: tmarciniak@WI.RR.COM
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Tim Marciniak <tmarciniak@WI.RR.COM>
Subject: Re: Loss of Power False Air Oil Breather?
In-Reply-To: <20020821.163712.-369375.1.kdlewis@juno.com>
Content-Type: text/plain; charset="us-ascii" ; format="flowed"
Ken,
Just a comment on unplugging the TEMPII sensor, this does increase
the idle, I cant remember how high the rpm climbed but the engine
sure does not like this sensor being disconnected. I dont think
Bently really comes out and says the rpm increases, but only that you
you set the timing at 2000 to 2500. I think the rpm climbed to about
1600 + or - 200rpm and it seemed that the longer it ran with this
sensor disconnected the more erratic it ran and then stalled. It was
kind of wild trying to set the timing.
Just as a side thought, I am wondering how much this corroded
accelerator cable on the van is throwing things off. Its obvious
that when I press down on the accelerator pedal at some point it
sticks but on the other hand when it releases itself I wonder if it
totally comes back to a resting position--it looks like it does but
his is a heck of a way to operate--I believe that cable has to be
fully functional otherwise it could effect the throttle enrichment
switch, and lead to some of the issues I'm having. Drove the van
today and only had some hesitation once or twice when the engine was
cold and I would accelerate from a stop. Once things warmed up all
was fine. Another crazy thing that happened during all this is my
temp gauge on the dash stopped working. It was working only
intermittently on Sunday and as of Monday afternoon it totally went
south---I suspect the sending unit is dead.
Next step is to replace the accelerator cable and go from there. Its
running better.
Tim
>Tim;
> I doubt that checking the continuity of the wires would show
>anything because of the intermeittent nature of the problem. I
>believe that unplugging the TEMPII sensor should cause the engine to
>idle at ~2k rpm. Check procedure in Bentley.
> I would put some injector cleaner in just like you are doing.
>
>Good Luck and Drive Safely
>Ken Lewis
>86 Crewcab 220K+ miles
><http://Neksiwel.20m.com/>http://Neksiwel.20m.com/
>
>
>On Mon, 19 Aug 2002 22:46:54 -0500
><mailto:tmarciniak@wi.rr.com>tmarciniak@wi.rr.com writes:
>
>Hi Ken,
>
>I fiddled around with this thing for a good part of the afternoon on
>Sunday. I checked out the coolant temp sensor (blue) and the intake
>air sensor in the AFM against the specs in Bentley, both of these
>sensors tested within spec at several temperatures--so the problem
>is not here. Also did the rest of the checks in Bentley concerning
>the AFM. About the only significant improvement I made was when I
>checked and slightly adjusted the ignition timing. The timing was a
>little off and I had not checked this in six years (my neglect) but
>the van has always ran fine. After I adjusted the timing this
>hesitation seemed to go away for the most part. I get into these
>things and I seem to lose perspective on what is OK (if this makes
>any sense) I drove the van to work today and it seemed to hesitate
>a couple of times when cold but for the most part much improved (I
>think). Another thing I need to do is replace the accelerator cable
>my is rust corroded near the boot that sits by the auto tranny so if
>you press down far the pedal will stick (dangerous), Ive been
>lubricating it just to get by but it was a pain trying to set the
>ignition timing with this cable problem. Fuel Pressure was in spec.
>I did not pull the fuel injectors but I ve thought about it, dont
>want to disturb them unless I have to since I dont have seals to
>replace them and I have no idea if they were ever out. Another
>thing I have not done yet is a thorough check of wiring continuity
>from the Digifant computer to the various sensors etc. Right now I
>think it was timing related, although I'm not sure. Next plan is to
>dump some fuel injector cleaner in the gas tank, replace the
>accelerator cable and then check and adjust ignition timing if
>needed. The ignition timing is not that easy to set when working
>alone, the engine speed has to be kept at 2000 to 2500 rpm which I
>tried to do by holding the linkage in position while trying to aim a
>timing light and turn the distributor at the same time. I dont know
>how often the ignition timing needs to be checked with
>electronic/transistor ignition like in the vanagon since you dont
>have all the wear like with traditional points but I think there may
>of been some change in my van's system. Timing is just something I
>have stopped doing with newer cars, guess I may of been wrong to
>assume I could ignore that. I let you how things are later in the
>week.
>
>Thanks for your interest.
>
>Tim
>
>>Tim;
>> I am stumped. What else have you found out?
>>
>>Good Luck and Drive Safely
>>Ken Lewis
>>86 Crewcab 220K+ miles
>>
>http://Neksiwel.20m.com/
>
>On Fri, 16 Aug 2002 17:41:45 -0500 Tim Marciniak <tmarciniak@WI.RR.COM>
>writes:
>> I did pinch it off and it seemed to run a little worse. Feeling a
>> little stumped right now. May do a compression test next to rule
>> out
>> a problem in the engine.
>>
>> Thanks for the reply.
>>
>> >Tim;
>> > Pinch off the hose leading to the breather pipe. If there
>> is
>> >significant improvement, your suspicions are probably correct.
>> >
>> >Good Luck and Drive Safely
>> >Ken Lewis
>> >86 Crewcab 220K+ miles
>> >http://Neksiwel.20m.com/
>> >
>> >On Fri, 16 Aug 2002 15:30:37 -0500 Tim Marciniak
>> <tmarciniak@WI.RR.COM>
>> >writes:
>> >> New problem just cropped up for me with my 90 Vanagon. I seem
>> to
>> >> have a significant loss of power both when engine is cold and
>> >> warmed
>> >> up..... I pressurized the intake system with air found a leak
>> coming
>> >out of
>> >> the oil breather pipe.
>> >
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>> --
>>
>
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