The float could be stuck because of stuck needle valve, or rust. The float could also be leaking and be full of fuel.
Gonna have to pull the head and find out what's wrong. Could be a bent valve.
Take the head off and replace BOTH valves.
You replace the gas valve.
If your main gas valve is stuck in the closed position, it must be replaced. This condition is the reason your thermostat will not cause the main burners to light.
odds are if the valve is stuck open it is either bent(from over rev/valve float), or siezed in the guide(over heating). no easy fix sry
It is just stuck,
Sounds like you bent the valve. You'll have to pull the head to fix it.
A code 37 on a Jaguar XJ6 means either your EGR solenoid or EGR valve is bad. Most of the time the valve is simply stuck open and it is a very easy fix.
I had this problem on my Escape. I removed the EGR valve and noticed that a piece of trash was stuck in the valve keeping it from closing and causing this vacuum leak. I took a screw driver and opened the valve to remove the trash. This fixed it.
The fuel tank will need replaced. There is a vent valve made into the top of the tank that has stuck and is not repairable.
The valve has failed.The valve has failed.