car is pulsing when reving motor?

loco wolf

New member
car runs fine, but when i floor my 1999 chevy cavalier 2.2 while parked it seems to not rev to max and begins to moan . Not steady sound more as if i was pumping the gas and not flooring it. But i am flooring it. (pulsing). My guess bad plugs, bad injectors, fuel pump bad distributer cap? anyone can help please?
 
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