Join Date: Sep 2008
Location: Fruitland Park,Florida
Since your getting an intermittent dtc 16, opti low resolution pulse missing, I'd take another vehicle on your trip.
Did you install a new opti pigtail wiring harness when you bought new opti? If no, buy a new pigtail and see if that solves problem. Bad wiring & connectors can cause codes to set.
If you plan on keeping your 92 rs for awhile, buy a pc based oscilloscope to test low & high resolution signals from opti. Scope is only test instrument that will show the actual square waves of low & high res signals. Good for testing fuel enable 30 hertz signal also.
Buy pc based scope on Ebay, Amazon, etc for around $70. If your new or rebuilt opti is anything but a GM, Delco, or Delphi, you have a high chance of it failing quickly. Your problem could be wiring pigtail. Or it could be the beginning of optical failure of new opti.