loss of power

i bought a 99 cavalier z24 about 10 months ago. since then i have had some sputtering problems and lost some horsepower. any ideas why?

i bought a 99 cavalier z24 about 10 months ago. since then i have had some sputtering problems and lost some horsepower. any ideas why?
you may jus need something simple such asan oil change or spark plugs or filters/intake check into those and if it still occurs jus tell us and someone else may be able to further assist you....

i have almost brand new spark plugs and intake filter, and i changed the oil a few months ago

did you do the fuel filter as well?

Fuel filter. BTW, an oil change really won't help running problems anyway.

yea i changed the fuel filter about 2 months ago.

have you had it checked for any fault codes,did you check it for vacuum leaks. maybe change the plug wires as well.

no i didn't do any of that stuff. i'll try to do them ASAP.

even though im sure the oil isnt your problem, if you changed it a few months ago it needs to be changed again very soon