My civic as of late is acting strange sometimes. My idle will be normal then it will drop and the car will start to rattle just a tiny bit it doesnt do it all the time tho, and most of the time its not around 800 rpms its lowerwhat can cause this? or im I worrying for nothing

 

Vacumm Leak maybe

 

the cord connecting the throtal to the pedal may have came a little loose, you could check that and tighten it if it needs it

 

if this happens with the ac on you probly have the same problem as mine try checking your IACV. hope this helps

 

fuel filter, or o2 sensor maybe