Repair. Did static check came back .78 total.. with a slight possible oil can from return duct. Seemed to fix the issue with a couple slips. Also noticed a slight whoosh sound when furnace lights off. Tested gas pressure that came back to where it should be. Did here the sight glass and door tag rattle. Fixed this issue with some silicone and phone tape. Mark was hearing the noise of rattle when the furnace was lighting off. Also tested furnace ignition with multiple gas appliances on to see if possible gas problem on ignition. This came back to same result of whoosh noise on ignition. Mark wasn’t to excited about adding a return to the hallway the one spot we could would have been a couple feet from supple. And flex or hard pipe when be right over the top of dryer.