My 2010 f150 is running rich on cold starting first thing in the morning, I have replaced the mass air flow sensor, I do have an after market spectra air intake and after market throttle body. What could be making it run lean only in the morning

 

Put the stock intake and throttle body back on.

 

My only thing is that I have had the truck since late summer, and it didn't start this problem until it got cold out, below 40° in morning