Dakota Losing Power

[19eclipse97]

TRUCK IN QUESTION

1999 DODGE DAKOTA 4-CYL MANUAL TRANNY
148,000 Miles
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Recently it has felt like my truck is not performing like it used to, ive done most regular maintinance on it, its not a very powerful truck to begin with, but it just seems even less powerfull, when the driving at top speed or in any gear it just dosent seem to feel like its going fast as it used too, its not clutch or throttle, just seems to be losing power, any one know of what might cause this, or a partucular area of truck that might be wearing out, or is it just getting old that might be responcible?

please any input is appreciated, thanks ahead of time.
- nolan

[taillight]

How long has it been since your last tune-up ?

[19eclipse97]

its had all its regualr sched maint. always on time.

[taillight]

Pull your trouble and see if the computer does not like something. Have you changed the O2 sensor yet ?