Engine bogging down with any swift throttle change

[RETed]

Check TPS first...
Make sure it "reads" linearly from rest (i.e. idle) all the way up to WOT.
Make sure max resistance isn't over 5.5k-ohms.

After checking the TPS, unplug the boost sensor electrical plug and see if this condition changes?

If those two things check out, I would try and eliminate the ignition (spark) side of things, since it's easier at this point...
Make sure all our spark plugs are firing, etc.


-Ted