Long starts

[06f3506.0]

On my 06 it's been taking longer to start in the cold granted it's cold out this morning it was around 15 to 20 degrees. I let the glow plugs cycle threw it took around 4 to 5 seconds to start after it's warm it starts fine if it sets for over 4 or 5 hours it takes around 3 to 4 seconds to start. Grant the high was only 30 degrees. But to "ford" that's normal for a 6.0 in cold weather it just seems as soon as I returned my sct to stock it started doing this. Also there is no codes

 

[Keanoknick]

Does it run rough when it first starts, any smoke? if so how long does it smoke, just a couple of seconds, or longer?
Try plugging the block heater in for 2-3 hours then start it, just to see if it makes a difference. If it does, I'd start looking at your glow plugs or the gpcm.

 

[06f3506.0]

I mean it mite smoke for 45 seconds or a minute just cause it's so cold outside like anything does. But it idles smooth and starts fine