Ok, i know there are a lot of idle threads already but i couldnt find one that really sounded like something im experiencing. (i also stop looking after a while)

i notice that my idle sometime "jumps" for a little while and i can hear the exhaust with slight "pops". they are not like backfire pops but like low rumble pops (if that makes sense)

the rpms also "jump" only about 100-150 rpms (have to double check later today)up and down. the "jumps" and "pops" are connected. i dont know if this is normal but it sounds a little weird and it does not always do it. Sometimes its more noticeable and the rpms drop about 200 rpms.

will post a good video of what is really going on later today.

i just feels and sounds like something is off. any ideas?

 

on a side note, the air pump is not used. so this might be causing the problem i was told.