Name...that...component!!!, A quest to name this component!!! Options

[IfWeChoose]

TL:DR Look at picture below and tell me WTF this thing is. Thanks.

Hi people!

I have been having this super annoying issue with my car where it jerks SO MUCH! Sometimes it doesn't happen for a few days, other times it'll happen for several days. Sometimes it'll happen only when the engine is cold, other times it'll happen when warm. I've replaced a few components during my diagnosing attempts and the car ran better overall each time I replaced something (come on! I have more miles than you after all!), but I still had to put up with the jerking! Keep in mind that my problem is resolved, I'm just giving you a back story!

I've done:
Full tune-up - was not overdue but didn't hurt to perform one
Fuel filter - that thing was nasty! The gas came out black
TPS - had amazing throttle response after replacing
Fuel pump - WHOA! Ran so smooth (of course when the issue wasn't occurring)

I suspected:
MAP - F**K THAT S**T! So damn expensive. Plus I flicked it hard enough and the engine didn't react (tried and true method of testing)
Engine mounts - they didn't look too bad
Clutch - passed all of my tests (plus, is about 4 years old)
Distributor - Uhhhhh, let's not go there...

So, I was checking for vacuum leaks today and noticed a sensor looking thing on the firewall, behind the TPS. I flicked it as hard as I can (I can bruise a human being with a single flick, sometimes make them bleed) and the engine stuttered and almost stalled out completely - told you my flick method works. I unplugged this device and the car has since ran soooo smooothly. OMG BRO, like its a new car! #firstworldproblems #WTFisthisSHIZ #INormallyDontHastagButIveBeenDrinking #nof*cksgivenSFWversion

So, what is this thing! I won't give excuses as to why I don't know what it is...I simply don't know what it is!

The engine bay is not of my car and is, in fact, not a Celica. However, the location of the unknown device is the same.

Thanks peeps!

[Nial]

I think you were right the first time, iisnt it the air con idle up valve if it looks like that. I thought the EGR valve as attached to the engine....I have no idea why I think this, some distant memory from when I had a Corolla (before some daft tart wrote it off) but my memory isn't the most reliable source of information.

This post has been edited by Nial: Feb 10, 2015 - 1:38 AM