1999 Suzuki Baleno

Engine Mechanical problem
1999 Suzuki Baleno 4 cyl Front Wheel Drive Automatic 100000 miles

my 1999 suzuki baleno milage: 100.000, has idleling problems. Enige has been overhauled, and the gasket has been replaced, sparkplugs also has been replaced, the car got a complete service. Could it have something to do with the valve that needs to be fixed? Or maybe the sparkplugs arent doing there job good enough? Any help is apreciated, thanks.
Suzuki baleno
February 14, 2009.

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