I loaned my vanagon to friends last weekend and didn't drive it until
yesterday. It stumbled on acceleration so badly and went at
parkling-lot speed so rough that I thought they may have put some very
bad gas in and clogged the injectors. I put in some cleaner, but today
it drove the freeway fine but on an access road lost all power.

I'll get to the point and tell you that it was the fuel filter, at
least so it seems so far.

I banged the inlet end on the driveway and watched what looked like red
mud and gasoline slurry come out.

So don't overlook this cheap and easy-to-install part.

Jim