Date: Sun, 31 Oct 1999 22:13:33 -0600
Reply-To: John Rodgers <inua@SCOTT.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: John Rodgers <inua@SCOTT.NET>
Subject: Re: go to this link for pic- throttle spring adjustment question
Content-Type: multipart/alternative;
Peter, I don't have a syncro, so this may not be pertinent, but on the
GL that I have, re-setting the O2 light in the dash does nothing except
set the counter in the little black box down under the front of the van
just above the spare tire. This is something you can do yourself, and
avoid charges at a garage. The speedometer cable from the left front
wheel attaches to the bottom of the box and drives a speedo facimilie,
It just counts revolutions. On the top side of the box, another cable
attaches, and that is the speedometer cable that actually goes to you
speedometer in the instrument cluster.
The little black box speedo has a sheilded button on the top, and when
the O2 light comes on at 60,000 miles, that button must be depressed to
reset the black box speedo for the next 60,000 miles. It is not
connected in any way or has any effect on the O2 sensor. All it does is
tell you the O2 sensor has been in service for 60,000 miles and needs to
be replaced. Put in a new one, and reset the O2 sensor button on the
little black box, and you are good to go until the next 60,000 miles is
up.
So forget any expection from that O2 lite and having it reset.
Now since it is unrelated except as a warning, you can ignore it.
When you disconnect the Idle Stabilizor, if warm, the engine will start
right up and should idle steadily. There is an adjustment screw on top
of the throttle body. On my van I can watch the tach as I turn the
adjustment screw with a long "Snap-on" screwdriver. If the engine is
cold and the idle stailizor is disconnected, the engine simply will not
idle. It will start, but it will die when you idle it.
Once you have the idle set, and as I recall 900 rpm was right on, shut
it down and reconnect the Idle Stabilizor. When you start your engine it
should run smooth, no hunting up and down on the tach.
Shutting it down that way, kills the signal to the computer and it has
to get a new signal to start and fuel the engine properly for a cold
start and cold idle.
Hope this has been of some help.
John Rodgers
"88 GL Driver
Peter wrote:
> Hi John,
> Thanks for your response! How did you adjust the idle speed? Is
> there a screw near the throttle that you turn? Do you set it at 900
> RPM?? My idle speed is currently OK when I disconnect the idle
> stabilizer, will that change when I replace the O2 sensor? I had my
> O2 sensor RESET, at about 60K then the light came on, but maybe it
> really needed to be replaced??
>
>
> - Peter
> '87 Syncro 84K
> Honda CBR 600 23K
> Reply to: printstud@bigfoot.com
>
>
> ----------
> From: John Rodgers <inua@scott.net>
> To: Peter <printstud@T-THREE.COM>
> Subject: Re: go to this link for pic- throttle spring adjustment
> question
> Date: Sun, Oct 31, 1999, 6:46 PM
>
>
>
> Peter, I had this RPM hunting problem on my '88Gl with the
> 2.1L engine.
>
> First I replaced the O2 sensor, then with the engine warm, I
> shut it down, disconnected the idle stabilized, started it
> up, adjusted the idle speed, shut it down, reconnected idle
> stabilizer, started up again.
>
> No more problem.
>
> John Rodgers
> '88GL Driver
>
>
> Peter wrote:
>
> While checking the throttle I noticed that
> the spring does not pull the throttle all the way
> back to the stop which it can go back to. It's
> kind of hanging somewhere in between , in limbo!
>
> see attached pic at:
>
>
> http://pws.prserv.net/synergy/Vanagon/Beltprob.htm
> )
>
>
> and see the pink arrow.
> I wondered if any of you Syncronauts out
> there have this same set-up?? Should the spring
> pull the return to the throttle all the way to the
> stop?? I am also having some idle variation,
> sometimes it hovers around 900 RPM (about half the
> time it behaves) as its supposed to, but then it
> will randomly start wondering up to 1500, or even
> go to 2-3000, then back down? or stay up? For no
> rhyme or reason that I can figure..... Its been
> doing this for years ( not just since I broke the
> cable), So I usually have to disconnect the idle
> valve. I wondered if these two problems are
> related and if the spring needs to be shorter to
> provide more pull on the return??
>
> Thanks for any experience you all may have
> - Peter
> '87 Syncro 84K
> Honda CBR 600 23K
> Reply to: printstud@bigfoot.com
>
> Picture posted/ hosted thanks to: david
> David Beierl - dbeierl@ibm.net
>
>
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