How is your idle rough? E.g., idle speed varies, speed constant but appears to be missing, car vibrates, engine randomly speed way up then drops back down, etc.

Also, item #13 - the fitting I think you are testing is not a vacuum port - it goes to the breather side of the pcv orifice. It is supposed to keep your engine from catching on fire the FPR fails.

Steve

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'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7