4 yr old York furnace that runs off of well gas. System has 8.1 inwg inlet gas pressure and had an output of 4.1 inwg. I reduced outlet gas pressure to 3.2 inwg. Checked gas line for any gas leaks, none were found. Tested ignition about fives times and did not have any issues. If issue comes comes back and continues we would explore the option of adding a low gas pressure switch.