LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 1985 >> Nova CL, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Feedback Carburetor System >> Servicing >> Carburetor Feedback System >> System Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

System Check

  1. Check TVSV with engine coolant temperature below 45°F (7°C). Disconnect vacuum hose from vacuum switch. Start engine and check that no vacuum is felt in disconnected vacuum hose. Reconnect hose.
  2. Check EBCV with engine warmed to normal operating temperature. Disconnect EBCV connector. Maintain engine speed at 2500 RPM. Reconnect connector and check that engine speed drops about 300 RPM momentarily.
  3. Check EBCV with engine warmed to normal operating temperature. Disconnect EBCV connector. Maintain engine speed at 2500 RPM. Reconnect connector and check that engine speed drops about 300 RPM momentarily.
  4. Check EBCV with engine warmed to normal operating temperature. Disconnect EBCV connector. Maintain engine speed at 2500 RPM. Reconnect connector and check that engine speed drops about 300 RPM momentarily.
  5. With engine idling, disconnect EBCV connector. Reconnect connector and check that engine speed does not change. Disconnect vacuum hose from vacuum switch.
  6. Disconnect EBCV connector. Maintain engine speed at 2500 RPM. Reconnect connector and check that engine speed does not change. If no problem is found, system is okay. Otherwise, inspect each part.
scientia non olet · About LEMON Manuals