An engine in good condition will produce a steady, constant vacuum reading above 15 inches at a warm idle.

Name: An engine in good condition will produce a steady, constant vacuum reading above 15 inches at a warm idle.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

A healthy engine should produce a steady vacuum reading between 17-21 inches of mercury (inHg) at idle, indicating efficient combustion and good engine condition. A reading above 15 inches, steady and constant, suggests the engine is in good condition.

An Engine in Good Condition Will Produce a Steady, Constant