Exam 27: Ignition System Diagnosis and Service

EMI can be produced by the vehicle's primary ignition circuit.

Spark plug firing voltage should normally be ______.

Name the three types of secondary circuit trace patterns available on an oscilloscope.

If a vacuum gauge shows a low but steady vacuum when the engine is at idle, the problem is a noncommon type.

The reluctor (or pole piece) of a magnetic pulse generator should be replaced as a maintenance item when engine spark plugs are renewed.

An oscilloscope shows electrical ____________________ changes over a given period of time.

Damaged spark plug threads in an aluminum cylinder head cannot be repaired. The head must be replaced if the threads are damaged.

Only engines equipped with a ____________________ may need to have their ignition timing set or adjusted.

Any hot spot within the combustion chamber can cause ____________________.

On an oscilloscope, which section ends with the primary coil current off signal?

Crankshaft position sensors [CKP] are _____ type sensors.

Identify the appearance of a normal spark plug.

The dwell period on a modern electronic ignition system ______.

Spark duration is represented by the length of the spark line and is measured in ____________________.

If a distributor cap or rotor has a mild buildup of dirt or corrosion, it should be ____________________.

The air gap between the crankshaft position sensor [CKP] and the trigger wheel is measured with a(n) _____.

An ignition module may be damaged due to a poor electrical ground circuit.

Usually an engine is timed so that the number 1 spark plug fires several degrees _____.

Name the three categories of stress tests used to check for intermittent ignition component problems.

All ignition system diagnosis should begin with a visual inspection.