Thanks everyone. Yes, I bled the air from the injector hard line already. Yes, I locked the tang before I installed the pump, but now I will double check IP timing.
I keep getting more and more vapor each try, I've been not holding down the pedal, thinking I was fueling too much before.

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1993 300d - Von Strudel
1987 190e (RIP) - Duke
1983 230e (sold) - Helga
1982 240d (sold) - Igor
1973 280 (sold and missed )