Checking and setting the ignition timing (Opel Astra G)

Neither the crankshaft pulley nor its flywheel are equipped with timing marks. The ignition timing is monitored and adjusted by the engine control module (ECM). No additional indication is provided, therefore, setting the ignition timing is not possible.

The only way to check the ignition timing is to connect special diagnostic equipment to the vehicle's DLC connector (see illustrations The DLC diagnostic connector is located in the center console in front of the parking brake lever under the decorative cover and Location of DLC connector in console), - if necessary, contact car service specialists for help.

[Article posted on Internet portal OpelBook]