Mechanics

BUICK RIVIERA ENGINE PROBLEM

1992 Buick Riviera • 200 miles

My car drives the same distance. About 20 miles to the destination and then when the engine its warm starts to buck and pull when I accelerate between 1000 and 2000 rpms. Ive replaced the fuel filter checked the fuel pump ab\nd completely replaced the ECM which helped for about a week and then the problem came back. The Catalyc converter is fine as well. What is the issue?
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Phil14
January 30, 2013.



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