Hi Tim,
    Check the fuel pressure 30 psi idle 36 under load.  vw provided an easy
place to tap into the fuel ring, just remove the screw (top rear center of
engine) and install a gauge with a 7mm hose and clamp. Or replace the fuel
filter. Some replacement fuel pumps (rubber sleeve over the pump) have a
small fuel inlet hole and can clog up at the inlet on late vans with no pre
filter.
    Rust happens. Using gas with alcohol will remove  moisture  from the
tank. It also cleans the injectors while you drive. The  alcohol blended
with gas is produced from corn.  Lots of corn is raised in the usa. Using it
helps both our farmers and the trade imbalance.
Midwesty

----- Original Message -----
From: "Tim Marciniak" <tmarcini@EXECPC.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, October 12, 2000 9:50 PM
Subject: Van hesitates--where to start troubleshooting?

>     I have a 90 Vanagon Multivan  2.1L just returned from camping a week
ago
> and the van ran fine except I did start to notice some hesitation/surging
> whenever I need to give it some extra gas, like during acceleration or
going
> up hill.  No problem starting, in fact when the engine is cold it seems to
> accelerate without hesitation so I think I may have a problem when I need
> fuel enrichment.  The idle is a little rough too, but not real noticeable.
>
> Just wondering if anyone has any ideas where to start troubleshooting this
> problem.  Just put new plugs in a week ago and did an oil change.  New
heads
> and gaskets about 10 monthes ago.  Van has 87,000 miles and the fuel
> injection system has never been serviced to my knowledge.  I pretty much
am
> thinking I'll just check components out as outlined in Bentley and work
> through it.  O2 sensor is also original.  Van does cruise at 70mph without
a
> problem.
>
> Any ideas would be appreciated.
>
> TIA,
>
> Tim Marciniak
> Muskego, WI
>