I remember GM MAF's are karman units, and produce a frequency based "count"
for the ECU, this would definitely not work properly without conversion...
hence the black smoke at startup(bad too rich) and extremely high MPG(bad,
too lean)  The fact that he can drive it like that at all is surprising.

Put a wide band O2 on the setup and watch it during a drive cycle. It's
likely a nightmare.

Jim Akiba

On 10/1/07, Tabe Johnson <greentabe-vanagon@yahoo.com> wrote:
>
> Man, that's worth a look, even if you don't buy the van!  Uh, would
> you mind bringing a camera and taking a bunch of photos of what he did
> while you're there?
>
>
> tabe johnson/87 westy
> (Interested in the MAF setup, but not believing the 26 MPG...  Maybe he
> has one of those
> electric turbocharger setups...)
>
>
>
>
> Date:    Sun, 30 Sep 2007 19:43:17 -0700
> From:    Clint Kolda <clint_kolda@YAHOO.COM>
> Subject: MAF sensor and a waterboxer
>
> I just called a guy about a 1985 vanagon that he has for sale.  He said he
> removed the AFM and
> wired in a GM mass airflow sensor.  He said he now gets 26-27MPG.  He
> indicated there is a little
> black smoke at startup, otherwise runs OK.  Has anyone heard of this
> mod?  What's a good price
> for a
> used AFM these days?  Maybe the van will need one.
>
>   Clint
>