I don't know about the MAF vs MAP sensor...whatever the vanagon uses,
that is what I think I have....they just stuck some pipe onto the end of
the Vanagon air filter assembly to run the intake around to the throttle
body of the inline motor....There is a rectangular box between the filter
and the rest of the 'plumbing' that has a long flat many wire plug....

  I do have a 3 wire O2 sensor.    That may be a contributing factor as it
is now about 60k miles old and runs on only one of the two downpipes I have
into my cat-less custom exhaust......"cooling down too much" on the O2
sensor, that could also be part of the issue, I suppose....It does seem
slightly more likely to hesitate when it is really cold outside, or when I
am up in the high mountains...

   I'll be working on all these 'possibles' soon.  I have a spare new O2
sensor that should go in anyhow and some adjusting of the throttle switch
is probably also due...as you say, it is a wear-item, being mechanical....

   On a different note, the van behaves like a "Sports Car" without all
that weight I was toting around all winter....

  Don Hanson

On Sun, Mar 10, 2013 at 3:27 PM, Scott Daniel - Turbovans <
scottdaniel@turbovans.com> wrote:

>  What I aim for on throttle switch at idle is ..
> as close as you can get it to breaking  contact 'just barely' off of full
> idle ..
> and as long as it always makes contact at idle every time.
>
> need to have a little bit of throttle cable freeplay too of course.
>
> Do you have a 3 wire heated oxygen sensor ?
> and is it working ?
> if it's non-heated ( should be heated on your engine ) it may be cooling
> off too much during deceleration for more than a little bit.
> I forget if you have an Air Flow Meter or an Air Mass Meter .
> which one please ?
> scott
>