Carry out the procedure for learning to supply air at idle speed, see below.
Normal speed x.x. should be at the level of 700±50/min.
Disconnect the connector from the throttle sensor.
Make sure that at the speed x.x. the ignition advance angle is 15±2°before TDC.
If the ignition timing is out of specification, adjust as follows.
Loosen the distributor mounting bolts and rotate the distributor until the advance angle is set at 15±2°before TDC.
Turning the distributor to the right increases the ignition timing.
Connect the connector to the throttle sensor.
Force the engine and make sure that the ignition timing is within the normal range.
Attention: If the speed x.x. out of range, adjust as described below.