Primary actions:
- clean, inspect and test the battery;
- check all fluids associated with the engine;
- check the condition and tension of the auxiliary drive belt;
- replace spark plugs;
- check the condition of the air filter and replace if necessary;
- replace fuel filters;
- check the condition of all hoses (branch pipes) and their tightness.
If these steps are not effective, then follow these steps.
Secondary actions:
- check the charging system;
- check the ignition system;
- check the fuel system.