There is no adjustment to the fuel pressure regulator.
Check your fuel pressure. These things are very sensitive to fuel pressure issues. In addition, pull the hose off the back of the regulator and see if there is fuel in the line which would indicate the regulator has failed (Note: this is not a vacuum line it is simply a "drain" in case the regulator fails)
I also agree you need to check the codes - however you mentioned the "assembly disintegrated", can you elaborate? I might have a part or two to help you out.
How did you set the timing? - You need to have the engine at operating temp, disconnect the coolant temp sensor, then set the timing. There are 2 sensors 1 for the gauge and one for the computer so be certain to get the correct one.
