If you all recall, I had this problem that felt as though the engine was
running on 3 cylinders intermittently. I used my ECU Monitor and went
through the entire ignition system - inputs to the ECU, ECU output all the
way to the plugs. All was well. Still the engine ran rough.
Since the problem was intermittent, I reasoned it was not mechanical.

The AFM provides an equal air flow to all cylinders,so it wasn't that. So
it had to be fuel related. I checked fuel to the injectors with a gauge. It
was good - 30 lbs. I pulled the hoses off the  fuel rails. Fuel was there.
That only left injectors.

Following recommendations from the Vanagon List I disconnected the
injectors one at a time, found one injector not pulsing properly. Driver
side, so I pulled the pair on that side and swapped with my red van which
is running really good but has a locked shifter and can't  be driven at tne
moment. The good injectors did the trick. It idled at 1800 rpm so I
disconected idle stabilizer valve and the O2 sensor and adjusted the idle
down to 880 rpm per Bentley.

I now have a sweet running 2.1 WBX in a Carat. 'Course there  are other
issues like rewiring the passenger  door so the window works. And other
stuff. But it runs sweet.

Thanks for the help and suggestions along the way. I did all the work
myself and for a guy just past a stroke it was an effort, but it was good
therapy.

Thanks again.

John