Go to the shoebox site. He has a pic of the correct place to instal cam pin into opti. www.shbox.com
#55 in component views section.
Note that his pic has where each cylinder's plug wire should go. It's a common mistake to place plug wires in wrong places.
Also pay attention to the correct hole cam dowel pin fits into. Note there's a similar hole on back of opti and 3 shallow holes. It is also fairly common for people to get cam pin to wrong hole.
Lets say you go opti installed correctly & plug wires in correct location. So next try misting plug wires with some water. Run engine at nigh in a dark area. That way you'll see if there's any spark leakage.
Next, if no spark leakage, lets discuss brand of opti you installed. If it's not a GM, Delco, or Delphi opti, it's junk. You will need an oscilloscope to see if opti low & high resolution signals are the correct square waveform.
You can buy a PC based scope for around $70 on Ebay, Amazon, etc. Scope is only 100% way of confirming low & high res pulse from opti to PCM are the correct square wave, with no drop out, or waveform changes.
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