- Refuel with unleaded gasoline only.
- When refitting the catalytic converter, refuel at least 2 times with unleaded fuel before installing the catalytic converter. In addition, on engines that require supergas, the ignition should be set to a later one, since unleaded supergas has an octane rating of only 95. How many degrees to change the ignition depends on the model.
- Do not start the engine by towing or "with a push". Unburned fuel, if ignited in the catalyst, would cause it to overheat. When the battery is dead, start the engine from the battery of another car.
- Avoid frequent starts of a cold engine in a row. In this case, unburned fuel accumulates in the catalyst, and when it is heated, its shock combustion occurs and the catalyst fails.
- If it is difficult to start the engine, do not turn on the starter for a long time unnecessarily. When the starter is running, fuel is constantly injected. Determine and eliminate the source of the problem.
- If a misfire occurs, remove the fuel pump relay connector before determining the cause. This prevents fuel injection when starting the engine. The fuel pump relay is located at the foot of the front passenger in front of the A-pillar under the side trim.
- Do not test for spark with spark plug tips removed.
- Cannot compare cylinders (balance test) by turning off the ignition of one of the cylinders. When the ignition of one of the cylinders is turned off - even with the help of an engine tester - unburned fuel enters the catalyst.
- In the event of ignition failures, avoid running the engine at high speeds and repair the fault immediately.
- Install only spark plugs recommended for vehicles with a catalytic converter.