one of the great features of a vanagon :)

question so the ECU only holds 1 second drop after turn off?

Joe
> -----Original Message-----
> From: Eric Zeno [mailto:vw4x4@FYI.NET]
> Sent: Thursday, July 3, 2003 11:14 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: ON/OFF TEST Re: 1991 Vanagon sputters and blows black smoke on              highway.
>
> Simple......  When your Vanagon is acting up,  driving down the road,
> simply turn the ignition switch off, count for one second, and turn it
> back on.
> This will reset the ECU.    If the van starts running good for the next
> 15 seconds or so,   you can safely conclude, that you have a ECU
> related problem.    In other words, a bad mechanical part of any
> kind, will not be affected by this test and the van will not show any
> difference in running.   Therefore, you have eliminated many
> possible problems.
>
>                                                    Eric
>
> Paul Nicklen wrote:
>
> >Hey Eric,
> >
> >Sorry to be slow on this stuff but how do you do the on off ignition test?
> >Many thanks, Paul
> >----- Original Message -----
> >From: <vw4x4@fyi.net>
> >To: "Paul Nicklen" <nicklen@PIONEERNET.NET>
> >Cc: <vanagon@GERRY.VANAGON.COM>; "emz" <emz@fyi.net>
> >Sent: Tuesday, July 01, 2003 11:16 AM
> >Subject: Re: 1991 Vanagon sputters and blows black smoke on highway.
> >
> >
> >
> >
> >>I've seen this problem  time after time.  I alway ask the same thing?
> >>Did you do the on/off ignition switch test to reset the computer,
> >>at the time the problem is acting up?
> >>     Given these people are "good" mechanics,  and assuming all
> >>the usual things have been checked,  I would test the wiring
> >>from the temp. sensor to the ECU.  These break were the wiring
> >>crosses from body to engine.
> >>
> >>
> >>                                                          Eric
> >>
> >>Paul Nicklen wrote:
> >>
> >>
> >>
> >>>Dear Van Owners:
> >>>
> >>>I have a 1991 Camper Van and she is running very rough on the highway,
> >>>
> >>>
> >losing power, sputtering, blowing black smoke and running way too rich ((I
> >think)).  The van never dies completely.  This problem is intermittent and
> >may only happen one day in three and 40% of the time on those days but when
> >it does, it can get severe and it has been towed on occasion.  Several good
> >mechanics have looked at it and can't find a thing wrong with it.  Now we
> >are starting to play the expensive game of randomly replacing parts.  It
> >only has 4000km's on the new engine and has only done this since it got the
> >new engine.
> >
> >
> >>>We have replaced the air flow meter, O2 harness (two years ago), and it
> >>>
> >>>
> >continues to do this with these adjustments.
> >
> >
> >>>It is most noticeable up hills and on flats when there is a constant rpm.
> >>>
> >>>
> >It is not nearly as noticeable in the city.  When I aggressively rev the
> >engine up to 5000rpm, it seems to temporarily clear the problem for a few
> >more miles down the road and then it starts again. Also, the problem seems
> >less noticeable when I drive the van at a higher rpm range.  I was sure the
> >new air flow meter would fix it but no such luck.  It did seem better for a
> >while but it sat in a snowbank all winter after the new meter was put in.
> >
> >
> >>>Any advice would be great and  I feel fortunate to have access to so many
> >>>
> >>>
> >great mechanical minds.
> >
> >
> >>>Yukon Girl,
> >>>
> >>>Lyn.
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
>