When preparing for a compression test, technician A disables the ignition system. Technician B only removes the spark plug for the cylinder he is testing. Which technician is correct?

Question

Quizplus · Accepted Answer

Technician A is correct because disabling the ignition system is a necessary step to prevent the engine from starting during a compression test. Removing only the spark plug for the cylinder being tested, as Technician B suggests, is not sufficient preparation for a safe and accurate test.

When Preparing for a Compression Test, Technician a Disables the Ignition