IAT to Rail Pressure Correlation?

Oct 16, 2008
948
12
18
Idaho
Wondering what effect intake air temp has on rail pressure. Re-firing the truck after it's already hot and been driven gives me garbage loping idle and cranked rail. Returns to normal with some cool off time. Wondering if IAT's reading crazy high at startup are causing it. Non-intercooled setup. Curious if I'm looking in the right direction for a fix. Briefly looked at rail pressure IAT tables but didn't see anything that would create this issue. Thoughts?