"Problem Car"
1987 240GL
Have been having trouble with getting the 'ole beast started lately and once started not having much power till around 2500 rpm. Found cylinder 4 not working. Had replaced all plugs 3 weeks ago (wires, cap and rotor looked good) and air filter (forgot what a pain that can be to replace).
Yesterday I inspected every vacuum hose I could find, checked over the air hose from the AMM to the throttle body (no holes or leaks). Cleaned the fire trap, found that the #4 fuel injector wasn't working. Compression in #4 was 150 lbs (thought that wasn't too bad). Replaced the injector and suddenly idle was better (not great, but better) and acceleration was noticeably better. This morning she started up like a top, idled a little and died. Restarted and got her running and looked over everything I could think of as to why she just won't idle cold without dying.
So in my not so genius mind thought that the cold air motor might not be working. I unplugged it and tried to start her. No dice. Plugged back in and still no luck getting started. Tried starting without the AMM next, still no luck.

Here's what I'm looking at right now:
Everything is back as it was when she started first thing this morning, but she just won't start. Is there somewhere else I should be looking?
Thanks.

P.S. - 20 mins after typing this (and forgetting to submit it), I got the car started. But I have no clue why it started. It's like the car is possessed.