Sign | Probable Cause | Remedy |
| Unstable work of the engine | Too poor or rich fuel mixture | Repair or replace the carburetor |
| Leaking fuel from the unit delay | Replace |
| Insecure vacuum hose | Attach the vacuum hose |
| A defect in the air intake system of heated air | Repair or replace |
| Unstable work of the engine idling | Disconnect the pipe from the air filter | Repair or replace |
| Incorrectly adjusted the speed of the crankshaft of the engine idling | Check ignition timing and adjust the speed of the crankshaft of the engine idling |
| Incomplete opens the air damper | Repair or replace |
| Overflow fuel in the carburetor | Repair or replace |
| High or low level of fuel in the carburetor | Repair or replace |
| Clogged air inlet | Clean or replace |
| A blockage in the exhaust system | Replace the exhaust system |
| Running the engine is not controlled | Faulty carburetor | Repair or replace |
| Insecure vacuum hose | Attach the vacuum hose |
| Contaminated fuel hose | Clean or replace |
| The fuel filter is dirty or damaged check valve | Replace the filter |
| The water in the tank | Replace check valve |
| Improper Fuel | Clean the filter and piping, fill clean fuel |
| Reduced engine power | Damaged catalytic converter | Replace the catalytic converter |
| Damaged seal air filter | Replace the gasket |
| Damaged seal between the air filter and carburetor | Replace seal |
| Damaged intake manifold gasket | Replace the gasket |
