Cold Soak Start Problem
Thread Starter
|
Mountain Pass
Joined: Dec 2010
Posts: 217
Likes: 6
X2 what Josh said and I will add just for the heck of it after the truck sits over night before you turn the key on remove the secondary fuel filter and see if there is any fuel in the filter housing, I have read that a failing fuel pump will allow the fuel to drain back to the tank through the pump, I guess another way this could be proven out is to let the truck sit with the key on for 15 seconds or so before you attempt to start it. Im betting the HPO system is fine if you are showing ICP greater than 500 while cranking. Another thing you could do if you know someone who has a 6.0L is swap the FICM with a known good one and see if that does it.
Thanks guys for all the input an help. There is a wealth of knowledge here
1. FICM. Reworked 30K miles ago. I am getting a full 48 v so this is not on my direct radar right now. Also I have no problem once the truck has been started once in the morning further pushing the FICM down the list
2. Fuel Pump. New 10k ago so shouldn't be failing. Also have the blue spring installed. Incidentally while diagnosing the injector harness replacement the fuel pressure was checked and was low but the dealership mechanic who worked on that diagnosed fuel filter problem and replaced by doing a by pass test direct from tank and was confident that the pp wa fine pulling 70 PSI when valve was switched to directly draw from fill spout on tank but only 40 PSi when drawing thru filters. I was scepticle of the filters since they had less than 10K on them but he assured me when he changed them that they were an issue. Was not quite mentally nimble enough to understand how he was isolating the filters since I thought the main filter was in front of pump and his two way valve and pressure gauge was connected to the fuel bowl and a tube back to the filler cap on the tank
While ifuel flow could be a problem I am leaning away from this though for now but will try to let the pump run before starting and see whAt that does.
3. So still focusing rightly or wrongly on the HPOP system. Out of interest what is the difference between oil pressure and oil volume. Could I have sufficient pressure which i seem to have from the ICP but still not have enough oil volume to fire the injectors on a cold soak start.
Diagnostics on the 6.0 is a mental challenge which you guys seem to be able to handle well
Mark
Certified Thread Hijacker
Joined: Aug 2001
Posts: 14,441
Likes: 58
Thanks guys for all the input an help. There is a wealth of knowledge here
1. FICM. Reworked 30K miles ago. I am getting a full 48 v so this is not on my direct radar right now. Also I have no problem once the truck has been started once in the morning further pushing the FICM down the list
1. FICM. Reworked 30K miles ago. I am getting a full 48 v so this is not on my direct radar right now. Also I have no problem once the truck has been started once in the morning further pushing the FICM down the list
For the 3rd time, so you have FICM/CPS/CKS synch during the cold start crank?
Josh
Hotshot
Joined: Dec 2003
Posts: 15,365
Likes: 120
From: Stuttgart, Ar
There's those 12 letters again--LOL.
Thread Starter
|
Mountain Pass
Joined: Dec 2010
Posts: 217
Likes: 6
Cheezit thanks for your input
OK so what is the fix on this.
1. Is there a seal that can be replaced and if so where exactly is it.
2. Does it need a whole new HPOP unit (the truck is at 210K so may be prudent to go ahead and replace while in there to replace a seal)
3. Is there a problem with the low pressure system supplying enough oil to the reservoir
4. Does the truck need to live on an incline for the rest of its life.
Mark
OK so what is the fix on this.
1. Is there a seal that can be replaced and if so where exactly is it.
2. Does it need a whole new HPOP unit (the truck is at 210K so may be prudent to go ahead and replace while in there to replace a seal)
3. Is there a problem with the low pressure system supplying enough oil to the reservoir
4. Does the truck need to live on an incline for the rest of its life.
Mark
Thread Starter
|
Mountain Pass
Joined: Dec 2010
Posts: 217
Likes: 6
Note HPOP cover seal/gasket not included with the HPOP kit in the box with pump!!
About $1K in those three parts
Will let you know of symptoms are gone when its back together
Hotshot
Joined: Dec 2003
Posts: 15,365
Likes: 120
From: Stuttgart, Ar
Sorry didn't get around to parking on a slope have just gone ahead and replaced HPOP 4C3Z 9A543 AARM (and STC fitting 3C3Z9T288 AA and IPR 3C3Z 9C968 AA while in there) Old style cast iron cover version.
Note HPOP cover seal/gasket not included with the HPOP kit in the box with pump!!
About $1K in those three parts
Will let you know of symptoms are gone when its back together
Note HPOP cover seal/gasket not included with the HPOP kit in the box with pump!!
About $1K in those three parts
Will let you know of symptoms are gone when its back together
Thread Starter
|
Mountain Pass
Joined: Dec 2010
Posts: 217
Likes: 6
Probably didn't need an IPR either but my theory is while in there it is prudent to replace these and hopefully not have to go back in later to do this.
For example when doing the engine harness went ahead and prohylactily replaced the sensor while the ac compressor was out
The old STC looked fine when it came out though and realize it is less subject to failure that's the post 2005 version (aluminum cover)
Mark
For example when doing the engine harness went ahead and prohylactily replaced the sensor while the ac compressor was out
The old STC looked fine when it came out though and realize it is less subject to failure that's the post 2005 version (aluminum cover)
Mark
Hotshot
Joined: Dec 2003
Posts: 15,365
Likes: 120
From: Stuttgart, Ar
Probably didn't need an IPR either but my theory is while in there it is prudent to replace these and hopefully not have to go back in later to do this.
For example when doing the engine harness went ahead and prohylactily replaced the sensor while the ac compressor was out
The old STC looked fine when it came out though and realize it is less subject to failure that's the post 2005 version (aluminum cover)
Mark
For example when doing the engine harness went ahead and prohylactily replaced the sensor while the ac compressor was out
The old STC looked fine when it came out though and realize it is less subject to failure that's the post 2005 version (aluminum cover)
Mark
Thread Starter
|
Mountain Pass
Joined: Dec 2010
Posts: 217
Likes: 6
No it's not the 05 motor. It ha s a tube type connector that connects the top of the pump to the branch tube. I guess it is a Snap To Connect configuration but maybe that's my poor terminology. In any case a different configuration to the flat type STC in the later model that gives all the trouble
Mark
Mark
Mark
Mark
Thread Starter
|
Mountain Pass
Joined: Dec 2010
Posts: 217
Likes: 6
Mark