Fuel injection system — idle speed and mixture control (Opel Omega A)

Note: On the Motronic system, only idle mixture adjustment is possible, since the idle speed is controlled by the idle speed regulator.

1. Start the engine, warm it up to normal operating temperature, then stop it and connect the tachometer according to the manufacturer's instructions.

2. Set the engine to idle and compare the idle speed with that given in the Specifications. If adjustment is necessary, locate the adjusting screw on the throttle body (l3 system only) and rotate it as required (photo).



3. Stop the engine, connect the exhaust gas analyzer according to the manufacturer's instructions.

4. At idle speed at the specified speed, measure the CO value and compare with the one specified in the Specifications. If adjustment is necessary, turn the screw located on the side of the air flow sensor clockwise to enrich the mixture, or counterclockwise to lean it (photo).





5. Adjust the idle speed if necessary.

Text was copied from the portal opelbook