Ok. So I found the hose that attaches to the exposed "nipple". It was just lying disconnected. Probably knocked out by the NTB tech looking for stuff he could charge me for last month. The "mystery" hose with the broken nipple I see connects to the back of the airbox lid. Apparently the previous owner had applied a fix that failed.ImUrOBGYN wrote:Are you missing the diagram of your vacuum routing that's underneath your hood? Should be there and tell you exactly what goes where.
That vacuum switching valve with the exposed nipple, heheh, is for the airbox flapper. I can't recall the diagram/routing offhand, though. And, it's 115am, sooo....
All back together and still idles at 3K+ when I start the car. If I disconnect the plug to the device just under where the throttle cable attaches then it drops to about 2.5K.ImUrOBGYN wrote:Well, any unmetered air taken in by the engine will call a surge and/or uneven idle. Not to mention, will have you running a bit lean. Get it back together, drive it a bit and let us know if there are any new symptoms or if the same ones remain. It sure can't hurt it to have vacuum lines where they go!
PS - When I bought my Vibe, the vacuum lines were ran incorrectly. No check engine light or anything. Thank goodness for vacuum line routing diagrams! I never see other GTs or XRSs to compare to.
thebarber wrote:IACV issue?
Today I took apart the IACV. I found It was binding inside so didn't rotate freely. Once I cleaned it up with carb cleaner it was much improved and I thought for sure that was going to be the fix. Unfortunately when I got it all back together the problem remained. I am about to throw in the towel and take it in to a dealer for them to figure it out. I guess it could still be something with the IACV like the solenoid. Anyone know how to test that? I hate to buy another just to find it isn't the issue. The RPMs do drop when I unplug it by about 500 rpm or so. Not sure if that means it is working or working incorrectly.SirLinux wrote:thebarber wrote:IACV issue?
Thanks
That is what I was going to look at next. Is the IACV the device I unplugged that is directly beneath where the throttle cable attaches? Know of a way to test it rather than just replace?
Interesting. I googled that question and got this -vibrologist wrote:It should close completely. It is the Idle Air Control Valve that handles the air to maintain idle.
http://www.2carpros.com/articles/how-a- ... body-works
I am sure you can find a good used one.
It should not be hard but maybe time consuming chasing a vacuum leak. There are several methods. One of them is using a smoke machine that induces smoke into the intake, and if the smoke exits somewhere there is a vacuum leak.In general, how hard is it for my mechanic to look for a vacuum leak?