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← TechnologyWhich outcome occurs when pulse width modulation (PWM) fails in controlling fuel injector timing?
A)Premature valve timing occurs
B)Detonation risk greatly escalates✓
C)Reduced combustion chamber cooling
D)Increased manifold vacuum appears
💡 Explanation
Detonation risk escalates because incorrect timing causes an uncontrolled combustion due to the failed PWM fuel injection controlling. Therefore pre-ignition occurs, rather than consistent and timed combustion, under lean environmental constraints.
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