I've got a 2000 si and i recently noticed that when i hit 3000 rpms the car starts to feel like it's vibrating/chugging along till 3500 rpms. This happens in any gear and i searched but couldn't think of any descriptive terms to really search for. Just replaced the battery less than 2 weeks ago any ideas as to what this is? if i missed a search just link it here. thanks

 

bump please

 

anybody have any clue? i thought this forum was the most knowledgeble. or even if anyone has any clues as to what to search for please lemme know

 

Have you replaced anything else aside from the battery? By chugging your talking about the cars breaking up in that rpm range? Sounds like it's missing. Tune up, maybe.