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Home >> Renault >> 1977 >> R12 Base, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Emissions System - Exhaust Gas RECIRCULATION >> Testing >> EGR System >> 1974 Models
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1974 Models

  1. On models without throttle (micro) switch, check EGR system with engine idling at normal operating temperature. With choke pushed fully in, apply vacuum to EGR valve. Engine should run rough at idle.
  2. On models with throttle (micro) switch, check EGR system with engine idling at normal operating temperature. Move micro switch actuating blade away from control cam to cut current to EGR solenoid valve. Engine should run erratically.
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