black cap on IAC

[snidehockey]

what is the black cap on the IAC valve w/ the little soft foam kinda filters in it for?

I sprayed the filters w/ intake cleaner cause they were so dirty...as well as the whole IAC Valve.

I also took off the throttle body and cleaned it all out, extended my SRI to a CAI
w/ new filter

cleaned all the electrical plugs (MAF - TPS - IAC - IATS) w/ electrical parts cleaner.

Now my rpms hang like crazy...when I take my foot off the gas and hit the clutch they go up just a hair then gradually fall to about 1800 and stay there for a good 5 seconds before it returns to normal.

What I'm trying to figure out is if those circle filters are clogged or too wet will it not let air escape and thus throw it into plenum causing my rpms to stay up?

 

[blacknblue2002]

the black box that you took the filter out of and cleaned is simply a 'noise dampener'...it does something to quiet the intake of the car I believe...there has been talk circulating that you can remove the box and connect a longer hose directly from the IAC to your intake...(not sure what good or bad that could do)...as far as the remainder of your problems...I'm having very similar issues so I can't really help you....hanging rpms are generally related to the IAC....but mine is a little more complicated than yours...I'd say if you never had the problem before, just wait for everything to dry out and then try it again...no need for the little 'donut' trick in the iac (explained in sticky above)

 

[snidehockey]

I read that thread about the box as well, however theres a round black cap directly on top of the IAC valve...I just took the filters out that I thought may be clogging it but it made no difference so I know that's not the cause.

 

[DTNODYA]

How did you remove the black cap? Pull on it??

 

[snidehockey]

yeah - it snaps off

 

[RandyStinchcomb]

that black cap is just a vent and has NO effect on performance......chances are you need a new IAC.........

 

[R.J.]

+1 new IAC