I have an 8890 with SS inlet. Having issues with the septum purge flow. It's set at 3 ml/min but reading like 20 ml/min. Bad EPC?
Then before going to EPC, check for inlet consumables..
One more simple thing you can do that keep inlet and oven temp 40 and remove column from inlet and by hand hold the inlet with septa in oven and check pressure is developing or not...