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.
Often times a bad MAF will cause the engine to not start. Other symptoms would be extremely poor gas mileage, extremely poor running condition, and fail emission testing. 5 times out of 10 the sensor is bad, 4 times out of 10 there is a vacuum leak. 1  P0105 Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction. 2  P0106 Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem. 3  P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input.