"Oh, and one last thing: A common mistake is to place the SOV o ring all the way up against the body of the valve rather than against the step in the tube that inserts in the the IP body."

I just made this mistake, placing the sov o-ring all the way up next to the body. I'm getting air in the plastic lines and tripped a code "fuel shutoff solenoid malfunction". Question, could this condition be the result of simply having the o-ring up against the sov body, or do I have something else going on?