Long cranking on cold starts?

[OUTTALUCK F250]

I've had my 06 F250 for year now and when I bought it it seemed to crank slightly longer then other 6.0's but recently it's taking even longer to start when it's cold. After I drive it for even 15 min I can shut it off and it will fire up immediately. I run Rotella T6 5w-40 oil. Been doing some searching and came up with a couple things but would like to see if I can narrow it down. ICP, IPR, FICM, STC fitting, Stand pipes and dummy plugs? Any and all info is appreciated. Thnx guys

[jesilvas]

I'd think ICP, IPR, stand pipes, and dummy plugs would cause long/no start while hot. Not cold. Thick oil won't leak easy. Hot oil will.
Get each battery load tested, test the alternator, and then test the FICM for proper voltages.

[PGreenSVT]

Originally Posted by jesilvas

I'd think ICP, IPR, stand pipes, and dummy plugs would cause long/no start while hot. Not cold. Thick oil won't leak easy. Hot oil will.
Get each battery load tested, test the alternator, and then test the FICM for proper voltages.

Good advice right there.

[jesilvas]

Originally Posted by PGreenSVT

Good advice right there.

I do better with 6.0 advice/knowledge than OBS 7.3 stuff

[OUTTALUCK F250]

I will check those things and see if I find anything. Thanks guys.