Maintenance

OXYGEN SENSOR
All models are equipped with an oxygen sensor. The 928S (with LH Jetronic system) do not use a warning light. On these models, however, it is recommended that the oxygen sensor be replaced every 60,000 miles. To reset mileage counter, proceed as follows:
1. On 928 and 928S (with CIS system) models, the counter is located to the right of the passenger seat floor. Remove counter cover retaining screw and cover. Press reset button all the way in to against stop. Ensure warning light is out.

Refer to Tune Up Specifications charts for correct ignition timing and firing order.

1985 - 88 MODELS
Ignition timing on these models is controlled by an Electronic Control Unit (ECU) and is not adjustable.