ok i have a jdm b16a and for some reason between 1000-2000RPM the engine will constantly drop several hundred rpm then go right back up, then drop several hundred rpm then go right back up, once i get the engine past 2000 its fine, it runs smooth. also when car is idleing about once a second the car act like it just misfired or something like that it will drop maybe 50 rpm or something like that. Anybody got any ideas? or maybe possibly its the ecu?

 

IACV, to test it out, take a hammer and hit it and see if it goes back to normal or just change it out,

 

lol

 

haha to be honest i did that but it didnt fix the problem so i just cleaned out the IACV and there was alot of crap. oh btw good luck taking it out because of the limited space well ihad problem with my hands being big. haha

 

okay i know i sound like a f-ing noob which i am but what is the IACV?

 

IACV= Idle Air Control Valve will be on the back side of intake manifold.