Diesel and Petrol Injection Systems Quiz

Which of the following is a common symptom of air in a diesel fuel system?

• Difficult starting or no starting.

• Black smoke from the exhaust.

• Excessive fuel consumption.

• Smooth running.

Water in diesel fuel can cause:

• Damage to fuel system components, including the injection pump and injectors.

• Improved fuel economy.

• Increased engine power.

• Reduced emissions.

A blocked fuel filter in a diesel system can lead to:

• Reduced engine power and poor performance.

• Improved fuel economy.

• Easier starting.

• No noticeable change in performance.

Excessive black smoke from a diesel exhaust often indicates:

• Incomplete combustion due to a rich air/fuel mixture or faulty injectors.

• A lean air/fuel mixture.

• A properly functioning engine.

• Low engine temperature.

Blue smoke from a diesel exhaust often indicates:

• Burning oil.

• Incomplete combustion.

• Excessive fuel.

• A faulty turbocharger seal.

White smoke from a diesel exhaust can indicate:

• Unburnt fuel passing through the engine, often due to faulty injectors or low engine temperature.

• Normal operation.

• Burning oil.

• A faulty turbocharger.

A fuel leak in a petrol injection system can result in:

• Fire hazard, poor fuel economy, and strong fuel smell.

• Improved engine performance.

• Reduced emissions.

• No noticeable issues.

Erratic running in a petrol engine can be caused by:

• Faulty sensors, injectors, or ignition components.

• A properly functioning fuel system.

• A lean air/fuel mixture.

• A rich air/fuel mixture.

Poor starting in a petrol engine can be due to:

• A faulty fuel pump, injectors, or ignition system.

• A properly functioning fuel system.

• A full fuel tank.

• Warm engine temperature.

Poor fuel economy in a petrol engine can be caused by:

• Leaky injectors, a faulty oxygen sensor, or a rich air/fuel mixture.

• A properly functioning fuel system.

• A lean air/fuel mixture.

• A new air filter.