Omniscient

It's weird. It goes up and down up and down. Like a metronome type thing. It's kinda slow paced. I have no clue what it is. Sometimes it goes away, sometimes it's there. It started like 2 days ago. Could it be my fuel filter or something?

Nelson

Check your air lines/tubes, ones that go from the manifold to the head, sounds like a hose is loose.

Omniscient

Now it's gone?! Eh, maybe it's because I just got a new battery after jumping my 5 year old battery once a week for a year?

Illegal B16

sounds like your idle air control cylinoid is dirty. (I think i spelled that wrong!)

JoePoonani

Iacv??

RicoD

i would have said vacuum leak, when i have those i just spray some carb cleaner and see where it bubbles up

SmartySarty

i had that funny idle too in my jdm h22a swap in a my eg cx hatch. I had an overheating problem and there was air gaps in my coolent house....................... i upgraded my radiator from the stock cx to a teg gsr radiator and once the air pockets were gone the bobbling idle went away............ so check to see if there is air gaps in your coolent

Omniscient

How do I check for air gaps?