Need to know what vehicle you have.
No, the boost gauge should not show boost pressure at idle. At idle, the engine is not under load, and the turbocharger (if equipped) is not producing significant boost. Typically, the gauge should read atmospheric pressure or close to zero during idle, as the engine is taking in air without forced induction. Any positive reading at idle may indicate a malfunction or a vacuum leak in the system.
By hooking up a vacuum gauge could help indentify bad valve. the needle of the gauge would bounce erractically during idle.
between 35/60 psi.
i believe so and i think its called a Idle Air Control Valve
A gauge does not idle, please rephrase and re-ask the question.
Low Coolant or faulty gauge
Yep!
Actually, it should be don e with a vacuum gauge, to maximum vaccuum. Without one, adjust the idle mixture to max., idle.
Idle the engine, remove the temp sensor wire on the engine and ground it. If the gauge does not move one can assume it has failed.
If it is not overheating then the temp gage or the sending unit are bad.
40 on idle up to 60 while on the move.
Example sentence - He tried not to be idle during his wait.