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99 LeSabre loses power when slowly going uphill, please help!
Dear all,
My 99 Buick LeSabre Ltd runs well and has been well taken care of.
When it slowly goes uphill, it loses power and sounds like it backfires. I have to either press hard on gas to give it more power or downgear. A good local mechanic took a test drive and says it is either the transmission slips or the catalytic converter goes bad. He also says that the engine is still very good. He suggests me to keep driving until the problem gets worse enough to show off and worth to fix. The guy from a muffler shop took a test drive and does not think that the catalytic converter is bad.
Please help!
Last edited by huynh; 02-06-2010 at 08:26 PM.
Reason: Removed email as suggested by HotZ28. Thanks!
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