Originally Posted by Chris W.

This is my opinion based on the following. I have one GP out right now. When I start the car in the morning when the temp is below freezing, it starts on 5 cylinders. It runs for 10-15 seconds before the dead cylinder starts to fire, and then it fires intermittently for another 15 seconds or so before it settles down and runs normally. It knocks a bit on that cylinder as it burns up all the unburnt fuel it accumulated during this time.

So if it takes 15 seconds of the car RUNNING to get a dead cylinder to _start_ to fire, I maintain that there is no way that just cranking alone with the starter will ever start your 606 unless you have most of your GP's in operation. I have started with 2 dead GP's also, but then it runs super rough, of course, on 4 cylinders until those dead cylinders start to fire.

I have not had the opportunity to observe this situation with a cold engine in warm weather to see how soon a dead cylinder will start to fire. My GP's always seem to fail in the winter...