'84 1.9L (with the 2200cc GW upgrade), digijet WBXR

Just installed the Sorensen fuel injectors (w/new seals) on Sunday.  Made in America.  On sale at a FLAPS (local A-Z).  Noticed an improved smooth idle and acceleration immediately versus my (recently cleaned OE FI's.  I had to fiddle with my idle versus the OE FI's.  The Sorensen FI is a "disk" versus the OE, which is a "pistel" type FI.  Some recent chatter on thesamba about these.

Then, I drove my Westy to work this morning.

The idle was rough and wandering, in fact the
engine died a couple of times at stoplights (started right back up,
fortunately).  Some bucking in 2nd and 3rd gear.  Wondering about a
vacuum leak, timing, O2 sensor, fuel filter, fuel pump, ECU.  I can put my
hand on the problem but never my finger...

I'm leaning toward a vacuum leak and more work on idle adjustment.

Ideas?  Thanks.

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