Chapter 34 & 35 Ignition Systems

Which of the following is a basic part of an ignition system?

• Crankshaft position sensor

• Throttle position sensor

• Ignition master relay

• All of the above

The spark advance system used on late-model vehicles adjust ignition timing using the _____.

• ECM

• ignition control module

• engine sensors

• all of the above

Which of the following spark plug components causes electricity to jump the gap and return to the battery through the frame ground?

• Shell

• Insulator

• Side electrode

• Center terminal

A cylinder that is NOT burning fuel on the power stroke is called a(n) ____ cylinder.

• missing

• dead

• non-firing

• malfunctioning

An engine cranks but will not start. A spark test shows good, strong spark. Technician A says that the no-start problem could be caused by fouled spark plugs. Technician B says that a fuel system problem is the likely cause. Who is right?

• A only

• B only

• Both A and B

• Neither A and B

The deposits on a properly burning spark plug should be ____.

• blue

• black

• white

• brown

While conducting a secondary wire resistance test, Technician A states that wire resistance should be approximately 12,000 ohms per foot. Technician B says that resistance should be about 50,000 ohms maximum for long spark plug cables. Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

Technician A says when testing a direct ignition system, it may be helpful to remove the coils and connect conventional spark plug wires. Technician B says this will allow you to connect a spark tester or an inductive tachometer. Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

Technician A says if a system fails to alter dwell when it should, the ignition control module needs to be adjusted to correct dwell timing. Technician B says if a system fails to alter dwell when it should, the ignition control module has a problem and should be replaced. Who is right?

• A only

• B only

• Both A snd B

• Neither A nor B

Timing advance is usually set several degrees before TDC.

• True

• False