K jetronic

[Labninja]

1976 450SE I have a high idle problem. I was looking around for vacuum leaks and fixed a few but I kept hearing a leak. I found that the adjustment hole between the fuel distributor and the air inlet was pulling air in.

After watching many videos I saw a few that had plugs. Mine didn't.  Is there supposed to be a plug? It looks threaded, if it is supposed to be plugged can someone tell me the bolt size/thread it uses.
Thanks

[daantjie]

Yes it should have a threaded little bolt in there.  I don't have the size but as a stop gap you can just put a snug fitting silicone type cap over it to seal in the meantime.

[rumb]

 Comes from factory plugged so you dont mess with it. When you eventually need to adjust  use
009975986
Little blue cap made for this purpose.