High School

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A gasoline-fueled engine starts to ping as soon as it reaches operating temperature but runs well during the warm-up phase. Which of the following could account for the condition?

A. Octane rating of the fuel is low
B. Octane rating of the fuel is high
C. Advance ignition timing
D. Low fuel rail pressure

Answer :

Final answer:

The correct option is A which is 'Octane rating of the fuel is low'. Gasoline with a low octane rating can cause knocking and pinging in the engine when it reaches operating temperature.

Explanation:

The correct option is A which is 'Octane rating of the fuel is low'. Gasoline with an octane rating that is too low for the engine can ignite prematurely, causing knocking and pinging during operation. This results in uneven burning patterns that can lead to engine issues. In this scenario, the condition could be accounted for by Option A: The octane rating of the fuel is low.

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