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Removed the plenum and tests I performed on the injector indicate that it is not working properly. I ohmed the #2 injector and it is open, the rest of the injectors read 10-12 ohms. I applied 12V to the #2 injector and it did not actuate, the rest of the injectors would actuate. Do the injectors just pop straight out of the fuel rail? I am having a hard time removing it.

Woops, forgot to mention that I did do that, I could short the #2 plug wire to the intake plenum and see a nice purple spark.

Just finished up a timing belt job on my 94 Pathfinder, everything seemed like it went smooth, replaced the usual while in there such as the water pump, crank seal, thermostat, and tensioner (I used only Nissan OEM parts). I did everthing per the factory service manual. I started it up this morning, it fired up right away and shortly after the check engine light came on. I checked the codes and got 23 and 45. Upon further investigation I found out that cylinder #2 is not firing, I confirmed this my lifting the plug wire for #2 and no idle change was noticed. I swapped plug wires and spark plugs and the problem still remains. I did a compression check as well just to rule out unlikely event of a timing belt slip and I got 165PSI, thats the same reading I got back when i purchased the vehicle. I am at a loss for what to do, I really don't want to have to remove the intake plenum to reach that injector. Are these injectors troublesome? They are the original injectors with 201K miles on them. I should mention that the vehicle did sit for about 1 month during this process

Thanks for the tips, I used a vacuum with with a long skinny attachment to clean out the area around the plug holes as they were quite dirty. Compressed air seems like it would work better, next time I will try that.

Finally got around to doing a compression test on the VG30E. It just rolled over 200k miles, all original except for a couple timing belts. Cylinder #1 - 182 Cylinder #2 - 165 Cylinder #3 - 180 Cylinder #4 - 165 Cylinder #5 - 172 Cylinder #6 - 192 Vaccum test was rock steady at 20 inches I know the FSM calls for no more than 14 PSI variations between cylinders. I'm not all too worried about my variations as the truck runs smooth and has plenty of power. Another thing, is there a special trick to the #6 spark plug, that thing took me way to long to remove and install.

My 94 does this too, especially on cold mornings. It will run rough for about 10 seconds and then start to clear up and then be fine for the rest of the day.