the idle check valve (start aide some call it) is easy to look and see if its stuck. Are You 100% sure the fuel on/off lever (spool) is going 100% open when you push in the lever from the drivers compartment ?
There is a slot on the end of this shaft, can you tell me when the lever is all the way out, what way the slot is, and when you push it in where the slot is at ? Explain via time/clock for me. Also has anyone ever had this fuel shutoff spool out of the barrel valve for anything ?
28% leak down it fine, How about your blade gap where is this sat at ? Injection isnt rocket science I am sure this will be something very simple. it should have a 39 nozzel and around a 80-90 pill.
Inlet to BV should be a 6an and return should be also. Forget the high speed until you get the setup right then start working on it.
the SLE, have you tried to just take it off and see what it does without it ?