Modern ignition systems (DIS)

The below image shows one of the main ignition components. What is its name?

• Spark plug
• HT lead
• Coil pack
• Lambda sensor

On which stroke does the above component ignite the fuel/air mixture?

• Compression stroke
• Power stroke
• Induction stroke
• Exhaust stroke

The below image shows one of the main components used in an older ignition system. What is its name?

• Distributor
• Coilpack
• Rotary injection pump
• Coil

Modern ignition systems no longer use the above component and are known as DIS, what does the acronym DIS mean?

• Distributorless Ignition System
• Distributor Ignition System
• Digital Ignition System
• Digitized Ignition System

The below diagram shows an earlier and commonly used type of DIS, what is part 2 known as?

• Coilpack
• Pencil coil
• Ignition coil
• ECU

The below diagram shows an earlier type of DIS, what is part 4 known as?

• ECU
• Battery
• Ignition switch
• Pulse generator

The below diagram shows an earlier type of DIS, what is the name of the wires/cables that connect the coilpack to the spark plugs?

• HT leads
• King leads
• Spark leads
• Coil lead

The component referred to in question 3 controlled the firing order (order in which the cylinders fire). In a modern DIS as shown below which component performs this function?

• ECU
• Coilpack
• Knock sensor
• Ignition switch

The below diagram shows an earlier type of DIS, this system is also known as wasted spark. Which of the following statements is true?

• Cylinders 1 & 4 (same for cylinders 2 & 3) fire/spark at the same time
• When cylinder 2 fires/sparks it is on compression and cylinder 3 is on induction so the spark is wasted
• Only one cylinder fires at a time. Typically the firing order would be 1, 3, 4, 2 or 1, 2, 4, 3
• When cylinder 1 fires/sparks it is on compression cylinder 4 is on power so the spark is wasted

The below diagram shows an earlier type of DIS. Which components would need to be removed in order to access/replace the spark plugs?

• HT leads
• Coilpack
• Pencil coil
• Cam cover