FREE DFFT Engines Questions and Answers

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If your car engine is overheating, what is the most likely cause?

Correct! Wrong!

Overheating is often caused by insufficient coolant, which is responsible for regulating the engine's temperature.

What might cause the check engine light to come on?

Correct! Wrong!

A faulty oxygen sensor can trigger the check engine light, as it affects the engine's air-fuel mixture.

If the car's engine has a lack of power, what might be the cause?

Correct! Wrong!

A blocked air filter restricts airflow to the engine, reducing its power and efficiency.

Which symptom indicates a possible problem with the car's ignition system?

Correct! Wrong!

If the engine cranks but does not start, it could indicate an issue with the ignition system.

What could cause an engine to produce a knocking noise?

Correct! Wrong!

Using fuel with a lower octane rating than recommended can cause engine knocking or pinging.

Which issue might cause a rough idle in an engine?

Correct! Wrong!

A faulty mass airflow sensor can cause incorrect air-fuel mixture readings, leading to a rough idle.

If the engine's oil pressure warning light comes on, what should you check first?

Correct! Wrong!

The oil pressure warning light typically indicates low oil levels or pressure issues; checking the oil level is the first step.

What could be the cause of a fuel smell inside the car?

Correct! Wrong!

A leaking fuel injector can cause a noticeable fuel smell inside the car.

What could be the cause if the engine is misfiring?

Correct! Wrong!

Misfiring is often due to worn or fouled spark plugs, which fail to ignite the air-fuel mixture properly.

What might cause a car engine to stall while idling?

Correct! Wrong!

A clogged fuel injector can disrupt the fuel supply, causing the engine to stall while idling.

What might be the issue if there is excessive white smoke from the exhaust?

Correct! Wrong!

Excessive white smoke often indicates that coolant is leaking into the combustion chamber and burning.

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