Thanks Peter.
Naw there's no discernable differnece when I break this line loose as opposed to the others. That's what has me stumped here.

I did talk tot he dealer serice man today qand he believes that it is the one injector though because at a 1000 psi variance it is too far out of spec.
I think I will try another injector in the hole and see what happens.

I'll try to post the results when I make this conversion...

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'99 S420 - Mommies
'72 280SE 4.5 - looking to breathe life into it
'84 300SD Grey - Sold
'85 300SD Silver - Sold
'78 Ski Nautique