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Home >> Honda >> 1987 >> Civic Si >> Repair and Diagnosis >> Engine Performance >> System >> Feedback Carburetor System >> Trouble Shooting >> Vacuum Switch C >> Civic 1500

Civic 1500

  1. Disconnect vacuum hose to vacuum switch. Connect vacuum pump to hose. Apply vacuum and check for voltage at vacuum switch.
  2. Check for voltage between Black/Red wire at control box No. 1 connector and ground. Voltage should be present when vacuum applied is below 3.0 in. Hg is present (Calif. man. trans.), or below 6.0 in. Hg (all other models). If voltage is not present, replace vacuum switch B.
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