To check pressure at the cooktop, remove a burner and that leaves the spud that the knob controls. The manometer I have came with an adapter that slips right on the spud so all that is necessary is to slip it on and turn on the burner.
If you don’t have that adapter with your, but you have the brass adapters, you can also check using the test port right on the gas valve. The service manual pictures its location.
Steve and Andra
2012 F350 6.2 gasser SRW LB
Fab Fours front and rear in case we run into a rhino
2019 Northstar Laredo SC