1.7L D-Jet ...
the tank vent return is hooked up wrong, that's supposed to go to the air-filter ...
right now, you're venting your cylinder heads into your tank evap system/charcoal filter! or worse, the other way round ...
both, the tank evap and the heads are supposed to vent into the airfilter ...
speaking of, what the heck is that bling thing doing there?
Andy
PS: also, it could use a good cleaning ...