Hard starting after valve adjustment.

[Antsrcool]

So my car had a bad smoking problem and very rough idle. So I did a compression test and cylinder 4 had 60 psi. No good. So I removed valve cover and the valves were stupid tight. After adjusting number 4 went up to 375 cold. And once it finally starts it idles smooth as silk and the smoke is very much reduced. I think the smoke I get now is unburned fuel in the exhaust. However now it will not start cold. And by cold I mean 45 degrees. Glow plugs all work I checked them. Even once running and got it cranks about 10 seconds before starting. Any ideas? Would a loose intake valve cause this? I may have not adjusted them tight enough because they were so tight I was thinking that they would tighten up rapidly after the valves were slamming into the head and finally seating knocking off carbon. There not crazy loose though. Injectors are all new and bench tested. Prior to valve adjustment it started pretty decent.