Rep Power: 0

i have a jdm d15b sohc motor. the idle fluctuates till it gets warmed up, then idles too low and wants to cut off. it didnt start until after i cleaned the iacv. it was doing it before, but not nearly as bad. is there any way i can just do away with the iacv? and if so, how?

 
Rep Power: 0

Take off the throttle body, take off the Fast Idle Valve, disassemble it and clean it thoroughly with brake cleaner (be careful with the rubber o-rings, a couple of them are odd shaped and probably brittle from age, so if you tear them you're off to find a new FIV most likely). Then thoroughly clean the throttle body itself with some carb cleaner, a shop towel, an old toothbrush and some pipe cleaners. Put it all back together and use a new throttle body gasket (duh).

If it's still acting up, double check your mechanical timing and ignition timing.

If those are fine, run the idle adjustment procedure. When you do the idle adjustment, while the engine is still cold and you've got it warming up to operating temperature (but NOT when the engine is hot) that would be a good time to also poke around the hoses with some propane, carb cleaner or starting fluid and see if there are vacuum leaks. If there are, repair the vacuum leak, obviously.

If none of those things do the trick, you might need to start looking for a new IACV and/or FIV.

Good luck.