Mike's Workshop Manuals
: Service manuals for every vehicle
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Honda
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1993
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Prelude VTEC
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Tests W/O Codes
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Symptoms
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Rough Idle When Warm
Rough Idle When Warm
Check Idle Air Control (IAC) valve, MAP sensor, fuel injectors, and EGR system for proper operation.