Deodra wrote:
I did, however, find this diagram just a moment ago and it appears to say that 1 and 2 are left coil and 3 and 4 are right.
I agree that it appears to say so the way it´s drawn up - however, it is misleading, what we told you is the correct version, one coil does fire 1/4 and the other does fire 2/3.
Could the popping potentially be something else?
When you say popping, do you mean it backfires, or does it just skip a beat? Either way it could be a number of things but look for the easy stuff first.
Could be something as simple as a bad plug, I´ve seen plugs that would fire out in the open but wouldn´t have enough spark to fire the cylinder under compression.
Use the method ltdrider and Milkman suggested and find out which cylinder is the problem. Swap the plug from the problem cylinder with one from a good cylinder and see if the problem moves, if it stays the plugs are likely ok.
Some other stuff to look for (assuming the carbs are ok): bad connection between a plug wire and it´s boot, missing or cracked vacuum port caps (the ones on the intake boots), worn or pitted points or a stuck advancer.