Important Workshop Instructions
- Use only the program memory (PROM) allocated to the vehicle.
- Protect oxygen sensor from fuel and silicon. Do not clean with or allow contact with petrol.
- Do not apply underseal to catalytic converter or oxygen sensor or in their immediate area.
- Leaks (dead air) in the intake and exhaust system in front of the catalytic converter cause incorrect oxygen sensor readings.
- Leaks in the evaporation control system lead to irregular idle speeds.
- If injectors are leaky, the engine may run on after the ignition is switched off.
- If starting is poor, check the fuel system, fuel pump relay and ignition system.
- Before removing electric/electronic components, disconnect ground cable from the battery.
- When the battery is disconnected, all trouble codes stored in the memory and learned values for idle speed and mixture correction are deleted.
- Cylinder balance test.
To Prevent Overheating of the Catalytic Converter, Follow the Time Sequence Outlined Here for the Cylinder Balance Test:
- Maximum switch-off duration of one cylinder 8 seconds.
- Minimum pause between each cylinder switch-off 8 seconds.
- When repeating the cylinder balance test, allow engine to run at idle speed for at least 60 seconds (recuperation) This time sequence is pre-programmed into the Opel/Vauxhall tester.