Join Date: Jun 2014
Location: Herculameum MO
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03 6.0 long crank when WARM not hot.
Sorry its kinda a long post but please bear with me. I have a 2003 F250 with 87k miles. About two weeks ago it started to crank for a 8-10 sec before starting when warm which isent normal for my truck usually it starts within 1-2 seconds. I use a scan gauge 2 and ive only noticed it doing it between 130-160f when the glow plug light goes on and off with in a couple seconds. However it is intermittent and will not do it when it is hot 160-180 or cold when the glow plugs are active. The ipr icp fmp are all good while cranking.
The FICM was replaced 5 months ago along with the oil cooler and egr cooler (which has sence been deleted). About a month ago i lost the right head gasket so i took the cab off studed it while putting it back together i pressure checked the HPO i dident hear any leaks. It has the early style oil rails without the standpipes and dummy plugs instead it has the stainless braided lines with quick disconnects. I changed the IPR and ICP sensor along with the #3 injector (my mistake) put the 6.4 banjo bolts in it deleted the EGR put a fass platinum fuel system on it in updated tubo feed and drain tubes.
Iv seen a couple of forums with people having similar problems some saying HPO leak others saying GPCM or glow plugs which is what im leaning towards.
I personally think it has something to do with the glow plug system because when i go to fire it up in the morning the glow plug light pops on for 5 or so seconds it fires within 1-2 sec and runs like a champ. As soon as its up to temp i can shut it off and it fires right back up every time. it only seems to do it in that 130-160 range idk maby the fuel doesn't want to light cause the glow plugs dont run in that temp range and when its hot its just hot enough to fire i have no clue. Has anyone else had this problem it just seems like know one can figure this one out. any help is appreciated.