ATS 11

What is the primary purpose of a diesel engine tune-up?

• Improve fuel efficiency

• Increase engine noise
  

• Reduce tire wear

• Enhance exhaust smoke

Which component is typically adjusted during a diesel engine tune-up?

• Exhaust pipe

• Air filter

• Fuel injector

• Brake pad

When inspecting the fuel system, which test is commonly performed?

• Compression test

• Fuel pressure test

• Cooling system test

• Battery load test

During a diesel engine tune-up, the fuel injectors should be:

• • Removed and discarded

• • Inspected, cleaned, or replaced if necessary

• • Inspected, cleaned, or replaced if necessary

• • Coated with grease

Before installing the fuel injection pump on a C240 Isuzu engine, what should be done first?

• A) Fill the tank with fuel

• • Align the engine to top dead center (TDC) on the compression stroke

• • Install the air filter

• • Drain the oil from the engine

Which timing mark is used to align the injection pump with the engine during installation?

• • Flywheel mark

• • Camshaft mark

• • Crankshaft mark

• • Pump gear mark

When installing the injection pump, what component ensures proper fuel delivery timing?

• • Timing gear

• • Injector nozzle

• • Camshaft sensor

• • Fuel filter

During injection pump installation, which component needs to be bled to remove air from the fuel system?

• • Radiator

• • Fuel filter and fuel lines

• • Oil sump

• • Intake manifold

When priming the fuel injection pump, what action is necessary?

• • Manually operate the hand primer pump

• • Remove and clean the oil filter

• • Increase air pressure in the fuel tank

• • Add extra coolant to the radiator

What is the purpose of a fuel injection pump?

• • Pump water into the radiator

• • Deliver fuel to the injectors

• • Cool the engine

• • Charge the battery