LEMON Manuals: Even more car manuals for everyone
Home >> Porsche >> 1982 >> 924 Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Specifications >> Tune-Up - 4 CYL >> Idle Speed & Mixture >> 924 Models

924 Models

  1. Remove rubber cap from plug terminal for oxygen sensor and pull off plug. Connect exhaust probe line at test connection of catalytic converter. Connect CO tester and tachometer.
    NOTE: All tests should be performed with engine at normal operating temperature and timing properly set.
  2. With radiator fan switched OFF, turn control screw or by-pass screw on throttle housing until specified speed is reached. If mixture adjustment is required, remove mixture control unit. Remove plug between fuel distributor and venturi. Reinstall mixture control unit. Insert adjusting tool (P 377 or equivalent).
    NOTE: Do not force or press down on adjusting tool during adjustment or engine will stall. Turn adjusting screw in very small increments as the slightest adjustment will change the CO level considerably.
  3. Remove adjusting tool and install plug each time CO level is checked or adjustment is made or a false CO level will be indicated. Accelerate engine briefly and allow engine to return to stabilize idle. Recheck both CO level and idle speed. Adjust if necessary. Install plug terminal for oxygen sensor and install cap on probe connection at catalytic converter.
scientia non olet · About LEMON Manuals