Exam 26: Ignition Systems

The typical amount of secondary coil voltage required to jump the spark plug gap is ____ volts.

A Hall-effect switch generates a ____________________ wave voltage signal.

Why is the correct spark plug heat range important?

Ignition timing is being discussed. Technician A says when the engine idle speed moves away from the desired idle speed, the PCM will adjust the timing to stabilize the engine speed. Technician B says when a knock is detected, the PCM retards the timing in fixed steps until the knock disappears. Who is correct?

Which of the following is NOT a spark plug thread diameter?

Explain how the spark plugs fire in a double-ended coil EI system.

Describe a coil-on-plug ignition system.

What happens when the low-voltage current flow in the coil primary winding is interrupted by the switching device?

Technician A says a magnetic pulse generator type sensor generates a small AC voltage each time one of the machined slots in the trigger wheel passes by. Technician B says some ignition systems use dual Hall-effect sensors that produce a 3x and 18x/revolution pulse. Who is correct?

If the required voltage to fire a spark plug is greater than the available voltage, the result is known as a ____________________ condition.

Some engines use a ____________________ sensor designed with an LED, a phototransistor, and a slotted disc to identify crankshaft position.

Which of the following is not a type of electronic ignition system?

How are engine misfires detected?

All the following elements except _____ are used in the spark plug center electrode to increase plug life.

Technician A says spark plugs are part of the secondary ignition circuit. Technician B says the battery is part of the primary ignition circuit. Who is correct?

Many of the inputs used for ignition system control are also used to control other systems, such as fuel injection.

Two technicians are discussing waste spark type ignition systems. Technician A says that half of the spark plugs in the system fire in reversed polarity [from the ground electrode to the center electrode]. Technician B says that the two spark plugs are connected in series with the coil. Who is correct?

Why is reserve voltage necessary in a secondary ignition system?

The period of time during which there is primary current flow through the ignition coil is called ____________________.

Describe a waste spark ignition system.