What are the two test sequences in the Two Speed Idle test?

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Multiple Choice

What are the two test sequences in the Two Speed Idle test?

Explanation:
Two Speed Idle checks emissions at two engine speeds to see how the engine and exhaust perform across different operating conditions. You start by stabilizing the engine at idle to get a baseline reading at low speed, then bring the engine up to a steady 2,500 RPM and hold it to measure emissions at that higher speed. This sequence—idle first, then 2,500 RPM—is why the correct answer is the option describing idle and 2,500 RPM. Other options either use the wrong speeds or the wrong order, which isn’t how the test is performed.

Two Speed Idle checks emissions at two engine speeds to see how the engine and exhaust perform across different operating conditions. You start by stabilizing the engine at idle to get a baseline reading at low speed, then bring the engine up to a steady 2,500 RPM and hold it to measure emissions at that higher speed. This sequence—idle first, then 2,500 RPM—is why the correct answer is the option describing idle and 2,500 RPM. Other options either use the wrong speeds or the wrong order, which isn’t how the test is performed.

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