misfire/gas smell/loud hiss but not plugs, MAF. or coils

[apr20vturbo]

Recently my 20th with 40K miles went through the coil pack replacement. I replaced them and everything ran fine for about 3 weeks.... then I changed my oil and filter and when I started it back up after the oil change it started having a crazy idle. I can't imagine I screwed anything up doing an oil change????? I tried unplugging the MAF and it still was an extremely rough idle. I then changed the plugs (BKR7E) and STILL the crazy idle. It's throwing the p0300 - p0303 and it smells like gas and has an extremely loud hissing sound with the rough idle. If I drive it and let the car warm up it seems to run just fine (no noticeable power loss). When I get to a stop light it seems to idle just fine for a couple of seconds and then it starts a little up and down idle (not near as bad as when its cold). I have no idea what to check next...any help would be greatly appreciated!!

[apr20vturbo]

ok actually after more looking, I think I have found the problem...I just don't know what it is.... Can anyone help me with what this is, how it came off, and how to fix it?

thanks!

This is the main hose where it splits and one part goes to the intake manifold and the other underneath

and here is where it came loose