Small but noticable power loss. Over the period of the last 3 to 4 months i have noticed a loss of power. Can you tell me what mite be the first reason for the power loss? I was thinking maybe it's time for a new cat or o2 sensors but i'm not a mechanic, or even close to being one.

Blocked fuel filter or bad fuel pump.

change or clean intake air idle control

run the fault codes and check for problem heated oxygen sensors(HO2S) and blocked cat converters

Look no further for help,
try this website ? www.reliable-store.com

normal wear on the motr can casue this, motors dont last forever

hopefully the air filter and fuel filter were replaced recently, if not, do so now

weather conditions, especially humidity and higher temeraptures can degrade fuel ecomony

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the magic fairy appears to be at work ,if its not leaking then its burning it ,which means valves guides or rings are worn ,and with your enviromental disaster monster engine you would not notice the loss in power in such a small vehicle ,we pull 40tons of loaded truck here with a smaller engine in europe

Have you replaced the fuel filter, spark plugs and wires? A plugged fuel filter will cause a fuel pump to go bad because it works harder to pump. It also may cause less pressure. Plugs, wires cap and rotor will cause lack of power and fail you on a load if they haven't been replaced for a while.

Check the connections on the battery,It sounds like one or both may be loose.

Not sure why yours lasted so long because I replaced the alternator in my '95 SL2 SIX (6) times before the engine self-destructed at 56,700 miles. They run hot because they receive little airflow where they are mounted and are physically too small to deliver the kind of power required of them.
Most chain auto parts stores will test your alternator free and I suggest you do that before growing more frustrated with it and possibly land in a dangerous situation caused by the failure of it.

there is a short in the car's electrical system drawing power from the battery, causing an interuption in the power (hence the clock resetting) and killing the battery. An experienced electrician should be consulted