I am inclined to agree. It seems related to TPS to me but I figure I ought
to go through the paces of checking all potential systems.

On 3/1/07, Dave Vickery <davevickery@hotmail.com> wrote:
>
> I woudl say it has nothing to do with Vanagon Syndrome that is a very
> specific situation caused by long periods of driving without moving the
> throttle position.
>
> I doubt it has anything to do with AFM at all as it wouldn't get bad all
> the
> sudden.  Plus everyone suspects those and it never is.
>
> It's not going to be the 02 sensor either.
>
> I doubt loose grounds either for a sudden onset.
>
> Is the gas good?, near empty with water in it?  If it runs crappy when you
> can work on it, you could try some spraying starting fluid into the intake
> and see if it revs up fine.  That would narrow it down to a fuel
> problem.  I
> am definitely not the sharpest tool in this shed but maybe this will help
> get some of the bigger brains to respond.
>
>
> >From: mordo <helmut.blong@GMAIL.COM>
> >Reply-To: mordo <helmut.blong@GMAIL.COM>
> >To: vanagon@GERRY.VANAGON.COM
> >Subject: Common problem, I think
> >Date: Thu, 1 Mar 2007 17:33:49 -0500
> >
> >So, the trusty, uncomplaining engine that I feel grateful to have had for
> >8k
> >miles has suddenly developed a condition that I know has been described
> and
> >discussed ad nauseam here, I think. I would call it Vanagon syndrome but
> it
> >isn't really. Also, I have the OEM harness that is meant to cure
> >"drivability issues." I have searched the archives, "the whole shebang"
> on
> >the BDTD site and also a cursory search through the Samba. I am left not
> >knowing exactly what's happening.
> >
> >2.1l water cooled, automatic, 160k miles
> >
> >engine starts as normal but whether cold or warm, when one accelerates
> and
> >runs the RPM up to about 2500, it will go flat - loss of power. If I let
> of
> >the throttle, it will drop to a low, erratic idle of about 800 RPM. I can
> >feather the revs til it smooths out at about 1700 rpm but it will not
> >return
> >to idle.This is, of course, sporadic but it has not disappeared long
> enough
> >to travel any great distance - maybe two blocks at a time without
> failing.
> >
> >Perhaps recall that I had written about this engine and that when I come
> to
> >a stop, in gear, the idle holds high at about 1100 rpm. Tapping the pedal
> >will let it drop to a consistent idle of about 950-1000 rpm.
> >
> >So, I'm thinking AFM or TPS mostly because of the high idle condition
> when
> >the engine was operating well. But, does the TPS usually cause the loss
> of
> >power (basically going flat) at higher RPMs?
> >
> >The engine was running perfectly on Sunday for a 160 mile jaunt back from
> >the Northern Neck of Virginia. This condition appeared Wednesday morning
> as
> >wife tried to go to work in the van. I reckon I should check the
> following,
> >in this order:
> >
> >
> >   1. disconnect oygen sensor
> >   2. disconnect idle stabilizer valve
> >   3. connections at injectors
> >   4. loose grounds
> >   5. TPS
> >   6. AFM track and wiper
> >
> >Can anyone suggest a more direct troubleshooting path? Am I confusing
> >symptoms by imagining the condition akin to the "syndrome"?
> >Cheers,
> >--
> >mordo
> >1990 Carat
>
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--
mordo
1990 Carat