Definition of quantal. 1  1 [Latin quanti how many, plural of quantus] : of, relating to, or having only two experimental alternatives (such as dead or alive, all or none) 2  2 [quantum] : of or relating to a quantum.
3. Engine movement. Another symptom of bad or failing engine mounts is an engine that moves in the engine bay. If the engine mounts are in good condition, they should be able to secure the engine firmly in the engine bay.
The first symptom of a failing camshaft sensor manifests as a warning from the carâs control module. As the camshaft sensor fails, the computer sends the driver a warning sign via the âcheck engineâ light on the carâs dashboard.