Date:         Sat, 21 Apr 2007 13:52:56 -0600
Reply-To:     Martin Jagersand <jag@CS.UALBERTA.CA>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Martin Jagersand <jag@CS.UALBERTA.CA>
Subject:      Re: Jerks/surges when going from coasting to acceleration
Comments: To: Mark Drillock <drillock@earthlink.net>
In-Reply-To:  <46292709.2060906@earthlink.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I unplugged the flat black connector coming out on the forward side of the
throttle
body (the connector slightly angled towards the air filter box).
But both the idle and jerky acceleration got a lot worse. With the connector
unplugged idle runs up and down, and the bus is hardly driveable at all.
Had to plug it back in to be able to drive.

Should I try to open up anything and clean out the throttle body?
Sorry for all the questions. Not counting the lawn mower, it's the first
and only gas engine I've ever had...

Martin

On 4/20/07, Mark Drillock <drillock@earthlink.net> wrote:
>
> Martin, if this is a FI engine you may have a problem with the throttle
> switch sticking. You can unplug the connector from the switch harness
> and see if it helps.
>
Mark
>
> Martin Jagersand wrote:
>
> > Hi,
> >
> > In the '85 Westy I'm getting a bit of surging and
> > a jarring ride when going from coasting to acceleration and
> > vice versa.
> >
> > I'm suspecting a combination of loose axial springs in the clutch
> > and slightly sticky throttle. It is difficult to step gently
> > enough on the pedal to get a smooth engagement of power.
> >
> > I had a similar problem on a Diesel several years ago and solved
> > it by slightly changing the attachment angle of the throttle cable.
> > (so more cable pull is required for a particular accelerator motion)
> >
> > Tried the same here (though cable bracket won't move very much due to
> the
> > starter), and tried to lubricate the throttle shaft. But I only
> > got marginal improvements.
> >
> > Any other suggestions? (I'm not about to pull the clutch though)
> >
> > The later diesels have a small gas shock damping the motions
> > of the accelerator. Do you think this is a good idea?
> > Ideas for jury-rigged substitutions?
> >
> > Thanks,
> > Martin
> > --
> > Martin Jagersand
> > University of Alberta
> > http://www.cs.ualberta.ca/~jag/
> >
>
>


--
Martin Jagersand
University of Alberta
http://www.cs.ualberta.ca/~jag/