🔍 Key Concepts

• how individual cylinder performance affects overall diesel engine operation • methods engineers use to isolate a single cylinder problem while the engine is running • what each choice actually measures or indicates on a diesel engine

💭 Think About

• Ask yourself which method directly changes or isolates ONE cylinder at a time while the engine is operating so you can compare its effect to the others. • Consider which options are general condition checks and which one is a targeted diagnostic for combustion quality in a specific cylinder. • Think about what a faulty injector affects first: fuel delivery, timing, lubrication, or something else?

✅ Before You Answer

• Identify which option allows you to observe a change in engine speed, smoothness, or load when a specific cylinder is affected. • Eliminate any choice that does not directly involve the fuel system or combustion in a single cylinder. • Confirm that the chosen method is something you can safely do on an operating diesel engine to compare cylinders one by one.