I'm running out of ideas-3-4 year occasional ignition issue on a Burkett burner. Nozzle and electrodes were replaced long ago. It might work well for a day, then time out a couple of times in one day. often times it times out in the middle of the night.
when I reset the ignition module it wasn't firing up, so I lifted the cover over the electrodes and noticed the spark gapping from the spring to the electrode was faint. On this particular time, it timed out again, but after another reset, it finally fired. Lots of smoke as would be expected, the oil is getting in fine.
Today I lifted the cover to observe the spark, the spark was strong and it fired almost instantly.
Do transformers fire weak at times, strong others? Any other leads on tracking this down? I've had a furnace guy out before, but he just tuned it up and it worked for awhile.