Sure sounds like a bad AFM.  See if you can find one in a junkyard that
they will let you try before you buy.  (Try two if the first one
doesn't' fix it.)  Also could be a plugged cat or air filter.

Good luck!

gbasey wrote:
>
> I've been having this recurring and now constant problem with my '80 vanagon
> (California emissions).
>
> At idle everything is fine. Even when I drive at low speeds there's no
> problem.  In fact since I've been working on this problem, I've got the van
> running better then ever except at higher RPMs. When I depress the throttle
> fully the van begins to sputter and lunge.  I can't get over 45 mph.
>
> Here's what I've done already:
>
> 1 changed the entire ignition system (coil, wires, plugs, cap, rotor, and
> distributor - was worn) properly set idle and timing.
>
> 2 changed the o2 sensor and the temp sensor (both needed replacement)
>
> 3 cleaned the AFM contact points and checked all ground wires, and ECU
> wiring as per Bentley
>
> 4 checked compression (105-120 all around)
>
> 5 changed the fuel filter, and replaced all vacuum lines
>
> What could be causing this problem?  I'm sure its probably in the fuel
> injection but am at a loss what to check.
>
> I'm located in western Indiana, does anyone know of a good mechanic in
> western/central Indiana?
>
> Thanks for you help
>
> Gary
> '80 westy (down but not out)

--
Stuart MacMillan
Manager, Case Program
800-909-8244 ext. 8208

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