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Home >> Chrysler >> 1983 >> Fifth Avenue 5.2 P >> Repair and Diagnosis >> Engine Performance >> System >> Electronic Fuel Control System >> Testing - Electronic Spark Control System Tests >> Spark Control Computer Spark Test

Spark Control Computer Spark Test

  1. Warm engine to normal operating temperature. Disconnect carburetor switch or unground it by placing a thin piece of cardboard between curb idle adjusting screw and switch. Be sure coolant temperature sensor/switch is connected and working properly.
  2. Remove and plug vacuum hose at vacuum transducer. Connect an auxiliary vacuum supply to vacuum transducer and apply 16 in. Hg. Increase engine speed to 1500 RPM and wait one minute before checking specifications. Advance specifications are in addition to basic advance. See Spark Advance Test Specifications table.
  3. If computer fails to obtain settings, replace computer.
NOTE: The 3.7L engine is equipped with an accumulator (timer). The carburetor switch MUST be ungrounded for 30 seconds before checking specified spark advance schedule.
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