944 L4-2681cc 2.7L (1989)
5. Turn regulating screw or bypass screw on throttle housing until specified speed is reached. Use separate tachometer from tester or similar.
Note: Fan motor and a/c compressor must be svvitchL'd off during adjustments.
Make adjustments as quickly as possible to prevent intake ports from becoming too hot, to avoid false CO reading.
6. Pull off rubber cap on plug for oxygen sensor and detach plug.
7. Check CO level. If CO level is not the specified value, correct the setting on the air flow sensor.
8. Connect plug for oxygen sensor again after finishing adjustments.
9. Coat threads of cap nut for test connection on catalytic converter with Bosch VS 140 16 Ft or Optimoly HT grease.
Torque specification: 30 Nm (22 ft lb).
