Okay, my newly acquired Vanagon (stock 2.1) failed emissions.

            IDLE                     2500
HC     53                         241       (limit 125)
CO% 0.18                     0.53      (limit 1.0)

So, HC is too high at speed. Engine runs fine (with lots of power.)

I had to replace the muffler (which was rotted and rusty and falling
to pieces. I pulled the old muffler and cat off the engine that used
to be in my Tristar (which had passed emissions without problems.)

What is the thought here? Tune up? Change the air filter? The HC at
idle seems high to me (though it is within limits).

Note, I'm trying to do the minimum as this engine will be pulled in
the near future and replaced with a subaru....but I have to get it
through emissions NOW so that I can get the registration taken care of.