My 1997 Buick Skylark has 165,000 miles on it. It recently started running very strange. When cold it runs very rough (coughs and sputters). When hot, it runs extremely (dangerously) fast. It will do 45mph without touching the gas. Maf sensor and oxygen sensor have both been replaced. Check engine light only comes on intermitantly. Any ideas?
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There could the dirt in the engine carburetor please clean it or the the engine is getting rich ,or the on board computer may be faulty in the car or the wiring of the spark plug is defective get it checked ..............................