2000 4.0 OHV IAC vacuum line?

[cal74]

Just picked up a 2000 Ranger 4.0 OHV, running rough under 2000 rpm's so going through the regular checklist and doing a tune up today.

First thing I went to go do is remove/clean the ICV. Appears to be a vacuum line that's supposed to be on it. Googling, I see a few pictures that look like it's capped?

If indeed it is a vacuum line, where does it supposed to go (pictures would be great) or if it's capped, is it a special cap or can I just cap it off?


Thanks

 

[RonD]

No, not a vacuum line, it is just an air vent to equalize pressure behind the valve.
As valve moves out and in air needs to come in and go out from the back side, none of that air goes into the engine, unless valves seal is leaking.

Yes there was a black cap that had a filter in it, just snaps on and off, never heard of any issue if cap was missing/lost