The noise sounds like a lifter ticking. However, the power loss is a concern to me. What that sounds like is the catalytic converter is loose and plugging. Start the engine and listen close to the converter for any hissing or strange sounds. Also, feel the amount of back pressure there is coming from the exhaust and let me know what you find. An exhaust leak caused by a plugged converter can make a ticking sound.
Let me know what you find.
Joe
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Friday, August 13th, 2010 AT 8:59 PM