CHECK THESE NEXT:

9. DEFECTIVE ACCELERATOR PUMP IN CARBURETOR; CONFIRMED IF ACCOMPANIED BY A POP OR BACKFIRE SOUND FROM CARBURETOR
Have carburetor accelerator pump professionally replaced.

10. FAULTY EXHAUST GAS RECIRCULATION (EGR) VALVE STUCK OPEN
Have EGR valve professionally serviced.

11. LOW CARBURETOR FLOAT LEVEL; CONFIRMED IF STALLS OCCUR WHEN CORNERING
Have carburetor float level professionally adjusted.

12. CLOGGED POSITIVE CRANKCASE VENTILATION (PCV) VALVE; CONFIRMED IF OIL HAS SLUDGE
Replace PCV valve.

13. WEAK VALVE SPRINGS
Have valve springs professionally replaced.

14. INCORRECT CARBURETOR FUEL/AIR MIXTURE
Have carburetor fuel/air mixture professionally adjusted.

15. LEAKING CARBURETOR GASKET OR INTAKE MANIFOLD GASKET
Have carburetor gasket or intake manifold gasket professionally replaced.

16. CLOGGED MUFFLER
Have muffler professionally replaced.