Date: Thu, 27 Nov 2008 16:21:50 -0800
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: Timing 2.1l WBX
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
that all sounds right to me.
Won't hurt to check or adjust your timing , but I don't especially think
your timing be off could be causing your problems.
Did you try the unplug the oxygen sensor thing ?
I've read about shorted 02 signal wires, and have never seen it actually.
On your silicone thing and your 02 sensor............I suspect that at the
worst it would render the 02 sensor numb or dead.........the same as if you
unplugged it, or it was just plan worn out.
When you said shutting it off and restarting, and then it was
ok.........that made me think of Vanagon Syndrome, not that I think that's
very likely.
Do you have the little adapter harness at the AFM that fixes that ?? I have
not seen a 'for sure' case where having that harness prevented Vanagon
syndrome. I prefer to have one on the AFM of course.,
Connection to your AFM..........think about that. And the AFM itself.
Mostly all I've seen those do is cause uneven acceleration or running.
Given that it's where something mechanical and something electronic
interface, it's a weak link.
I'm quite big on checking the throttle switch for adjustment and continuity.
They are over looked quite often.
Also........air intake leaks. If you have a steady idle and it revs out
nicely from idle when it's running right..........I doubt you have an intake
air leaks..........but those should always be thought about and looked for.
You don't have a cracked intake boot at the throttle body do you ?
I almost never see those, but I ran into one just the other day.
Engine movement will affect whether the crack opens up or not, making it act
up only sometimes.
'It's just a blockage or leakage of fluids or electrons."
( and 'fluids' includes all gases, vacuum, exhaust, air, etc.......not just
liquids like fuel and oil ) .
Just need to find those blockages or leakages.
you might try some wire wiggle testing........wile idling ........wiggle
things here and there, looking for intermittent electrical connections, or
air leaks.
And Grounds..........triple check those.
Nice when you find something really off or not right. Often I find several
'half not right' things........and added up ........those were the problem.
I would do all the resistance checks in the Bentley too. That just made me
think of your coil. I don't find coils to ever be just dead. I find them
old, and nebulous.....especially nebulous, like they're not really right and
healthy, but it's hard to tell.
And it always pays, of course, to have a whole set of known good engine
control sensors and devices - you get 'em cheap in a pick n' pull yard, and
immediately try them on your properly running vanagon..........then you keep
those as known good units for troubleshooting purposes. About 15 of
those.......AFM, distributor, coil,
fuel pump, etc. etc.
Hope you get it real soon !
Scott
turbovans
----- Original Message -----
From: "Allan Streib" <streib@CS.INDIANA.EDU>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, November 27, 2008 3:55 PM
Subject: Timing 2.1l WBX
> Trying to understand the proper ignition timing for my 2.1l WBX
> (Digifant). Based on my read of the Bentley, it should be 5 degrees
> BTDC at 2000-2500 RPM with the engine warm and Temp II disconnected.
>
> Is that correct?
>
> Another section talks about checking a 35 degree advance at 3000 RPM
> with the Temp II connected.
>
> Allan
> --
> 1991 Vanagon GL
>
> ------------------------------------------------------------
> + To unsubscribe from the Vanagon List send an e-mail to
> + listserv@gerry.vanagon.com with SIGNOFF VANAGON
> + in the body of the message.
> ------------------------------------------------------------
------------------------------------------------------------
+ To unsubscribe from the Vanagon List send an e-mail to
+ listserv@gerry.vanagon.com with SIGNOFF VANAGON
+ in the body of the message.
------------------------------------------------------------