Exam 26: Ignition Systems

A Hall-effect sensor has three wires connecting it to the PCM: (1) a 5- to 12-volt reference voltage, (2) ground, and (3) ____________________.

Resistor-type spark plugs are being discussed. Technician A says the resistor increases the plug firing voltage. Technician B says the resistor helps reduce radio frequency interference [RFI], which can interfere with, or damage, radios, computers, and other electronic accessories, such as GPS systems. Who is correct?

EI systems are being discussed. Technician A says a waste spark system has one coil per cylinder. Technician B says a coil-on-plug system uses a double-ended coil. Who is correct?

The ignition coil is essentially a pulse ____________________.

The magnetic field surrounding the pickup coil in a magnetic pulse generator moves when the ______.

Describe a dual plug system.

A late model ignition system can supply 30,000 to 60,000 volts of electricity.

Spark plug cables contain fiber cores that act as electrical ____________________ in the secondary ignition circuit.

Magnetic pulse generators produce a weak DC voltage when the teeth of the trigger wheel rotate past the pickup coil.

Coil-over-plug ignition systems are being discussed, Technician A says COP coils have less time between each firing cycle, which increases the heat in the coil and can cause premature failure. Technician B says the COP system allows the ignition timing for each cylinder to be individually changed for maximum performance as the system responds to knock sensor signals. Who is correct?

Modern ignition cables contain carbon fiber cores that act as a(n) ____ in the secondary circuit to cut down on radio and television interference and reduce spark plug wear.

When current flowing through a winding is at its maximum and the strength of its magnetic field is also at its maximum, the winding is said to be ____________________.

On a coil-over-plug type ignition system, a faulty coil will affect two cylinders.

Technician A says a plug with a V-notch ground electrode will have two electric arcs jumping across the spark plug gap each time the spark plug fires. Technician B says a spark plug gap that is too wide requires higher voltage to jump the gap, which can cause a misfire. Who is correct?

The hex size [socket size] used for tightening and loosing the spark plugs is either 5/8 in. or ______.

What is an engine's firing order?

Driving on a rough road can trigger the engine misfire monitor.

Which of the following is NOT a type of engine position sensor?

In EI systems using one ignition coil for every two cylinders, Technician A says two plugs fire at the same time, with one wasting the spark on the exhaust stroke. Technician B says one plug fires in the normal direction and the other in reversed polarity. Who is correct?

Computer-controlled ignition timing is being discussed. Technician A says when excessive wheel slippage occurs, the PCM will advance the timing to increase the torque output from the engine. Technician B says to provide smooth shifting of an automatic transmission, the PCM will temporarily retard the ignition timing to reduce the engine's torque when the transmission is beginning to change gears.