Foreline Pump Vacuum Issue

Issue

The Fore vacuum of my MS is showing a high value.

Check all parts or components you could have manipulated before.
Check noise level of the pump, check oil level and if oil is not leaking from the pump.
Check vacuum tubing and hose clamp.
Check if the vent valve knob is tightened.
Tighten the transfer line nut, check / replace columns ferrules.
Clean the glass top cover O-ring.
Check/clean front door o-ring if it was opened.
Check the helium pressure/flow applied in the column.
Check the argon applied pressure.
Check the CI gas is turned off if CI module is present.
Check if the issue is coming from MS or GC: Shutdown down the MS, remove the column from the transfer line and put a plug instead. Argon or air spray gas can be used around the vacuum manifold to look for characteristic ions (40-100).