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.
Symptoms Of A BAD MAF Sensor. When the MAF sensor goes BAD, you'll get the Check Engine Light to shine nice and bright on your instrument cluster. You'll also see one or several of the following symptoms of a BAD MAF sensor: Diagnostic Trouble Codes: P0101: Mass Air Flow (MAF) Sensor System Performance.