I'm back after some more researching. The DME connectors were totally fine and clean, but this morning I suddenly got the engine failsafe program after doing groceries. That was scary.. luckily it was only a short drive back home so I let the car cool down and opened the hood. The drive back home really felt like it had a vacuum leak, there was basically zero throttle response and a very rough idle.
As soon as I even touched this rubber hose and moved it the tiniest bit, the RPM would jump up and down. Sometimes when moving the hose the car just instantly dies.
I took a video of it happening as well as a short clip following where the hose goes:
https://youtube.com/shorts/BqUJYEn1Hmc?feature=share
I have a couple of questions now:
- Is this for the fuel tank ventilation? Or is it the oilpan ventilation? I'm assuming the first
- I have temporarily closed the vacuum side (TB side) with a bolt, and left the other side open so it can ventilate. Is this dangerous to drive the car like this? It is only temporary until I get it properly fixed
- Does this also explain the "throttle body briefly jammed" faultcode, considering the vacuum is on the TB?
- I tried spraying the entirity of the hose with brake cleaner to figure out where it was leaking exactly, but there was zero response. Moving the hose even 0.5cm up or down causes a huge spike/loss in RPMs. How does this make sense?
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