You need a new ignitor (Bake Ignitor) Thats what opens up the valve.
I'm not going to accept your answer until you or someone else can explain why opening a burner on the range will cause (or allow) the bake burner to light immediately. Seems to me that the igniter is hot enough to ignite the gas because the gas does ignite if another burner is on. how is a new igniter going to make a difference? I can tell you that there is no obvious difference between the behavior of the broiler igniter and the bake igniter respecting their apparent intensities and the the time it takes to ignite their respective burners (when another burner is drawing fuel, in the case of the bake burner).
I would test your hypothisis by interchanging the two igniters, if they are identical. Are they identical;?
OK then this is what you do. Put a ohm meter on the 2 wires you will need to disconnect them first.This dosent work like what you think it does.
You should get a reading between 50 and 150ohms if it falls within that range it's goodIf not then its bad.
Not really not unless there might be a loose connection on the control board but i still believe its the ignitor.