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Re: 2000 KIA Sephia - Help me go faster!
Is your check engine light on? This type of performance sounds like your catalytic converter may be blocking the exhaust. I have a 2000 w/ 195,000 miles and I just encountered this problem. I had been getting an obd code that was for catalytic converter efficiency threshold, but it would clear and not come back for a few days.
One day it started running as if I had no power at all. If I accelerated heavily, it would buck at me. Both of my cats were melted and broken inside. The cost of the cats was around $200 for both of them. One was from autozone and the other was a universal from pep boys. The universal one I had to weld the flanges on, but it works like a champ now.
Can you provide any more information about the car (how many miles, any other symptoms, recent failures/fixes) That type of info can help locate the problem.
Mark
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