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Old 08-30-2011, 03:25 PM
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6.0 hard start hot

A little back ground. About a year and a half ago I had head gaskets, egr delete, oil cooler, and stc fitting all replaced. At that time I also had head studs installed.

This past winter my truck started to start hard. So I thought it was my ficm going out. I checked it and voltage appears to be 48+ at key on and when cranking. Now this spring I had to take a trip about 5 hours away. When I got there my truck wouldn't start back up. After letting it sit for about 2 hours it finally started. Started hard, but started none the less. I then noticed through out the summer when it was warm it started hard. But being I dont drive this truck everyday and when I do it is mostly short trips I didn't have a lot of trouble, as I believe it never got overly warm.

Now fast forward to the last 2 weeks. After the truck gets up to temp it will not start till it cools for a couple of hours. I have noticed that when it doesn't that it appears to be cranking over faster than typical. I have also noticed that once it starts to get cool enough to start it will crank act like it wants to fire than crank fast, and then you have to cycle the key to get it to do the same thing again.

I had pretty much decide it was time to order stand pipes and dummy plugs, and I still think it probabaly is. Now today I had to do some running and when I got back I shut it off and tried to start it back up. It wouldn't fire up. So I disconnected the icp and I was able to get it to start. It still started hard but I was able to get it to start. I then plugged it back in and it wouldn't start, so I unplugged it again to make sure it wasnt a fluke and it again started but hard and more cranking than it should take.

Now finally on to my question. So what is my best approach to getting this fixed? Should I be thinking stand pipes and dummy plugs? Or should I be thinking icp? Or should I be thinking both? Or looking at something else?
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Old 08-30-2011, 04:13 PM
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i hope they put new dummy plugs in and the stand pipes in,they should have come with head gaskets unless they used black gaskets
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Old 08-30-2011, 04:17 PM
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Sounds like your on the right track with the stand pipes and dummy plugs. Do you have a Scangauge2, insight or gauge to tell you what your ICP and IPR values are? My feeling on this is that the ICP sensor is OK it's just telling the PCM that there is not enough hi-pressure oil to start the truck. When you disconect the ICP it assumes a default value. It just so happens that your engine is making enough hi pressure oil to run the injectors in a marginal fasion and the truck will start. The PCM wants to see at least 500 psi ICP to allow the truck to start.
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Old 08-30-2011, 06:06 PM
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Definitely dummy plugs and stand pipes. If you need the testing procedure for the dummy plugs let me know. One of my threads titled please help 6.0 won't start when hot will tell you everything you need to Check them. Replacing them is very simple
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Old 08-30-2011, 07:04 PM
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TESTING IT IS VERY EASY go get a air nozzle with the big rubber tip. get 2 wires and hot wire the ipr valve to 12 volts to close it make sure its unhooked though. you can buy the plug end at ford about 12 bucks or so. the remove the icp and put rubber end of nozzle in hole and apply air pressure you cannot over pressurize it so don't worry about that, then remove oil fill cap and air breather on driver side then listen. if its louder on one side then leak is there. but here is a heads up if the leak is on the side of the icp then after you fix that retest because if the leak is on the side your testing then there will not be enough air pressure to move oil on other side. if air leak sounds the same on both sides then stc or branch tube is leaking hope this helps.
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Old 08-30-2011, 07:40 PM
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They didn't do stand pipes and dummy plugs. I do have an insight cts and an act tuner if that helps.
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Old 09-28-2011, 08:07 PM
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Okay I finally got around to changing the dummy plugs and stand pipes. I can say that the o-rings on the dummy plugs were beyond shot so I am very glad that i went ahead and did them.


But I am still having the hard/no start hot issue. So what is my next option? I do know that a year and a half ago when my head gaskets were installed that they installed a new stc fitting. I woud love to do the work myself but don't really know what me next move is. Can anyone give me any insight as to what my next option would be. Also I dont want to just throw money at it but if there are parts that need to be upgraded I am more than happy to dig into it and change them.

Thank you for any help.
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Old 11-06-2011, 08:11 AM
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I have a 2003 6.0 with about 120k miles purchased used about a year ago. It has always started but runs rough until warm no matter if it's 30 deg. or 100 deg. outside temp, obviously worse in the colder months especially if not plugged in. I have changed the oil and fuel filter recently. No change in starting though it seems to run quieter and smoother once it's warm. I also used RevX at the oil change.

Is there anyway to know if it had the latest flash short of taking it to Ford and what else can I check myself?
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Old 11-06-2011, 08:53 AM
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Quote:
Originally Posted by rtyndallNC View Post
I have a 2003 6.0 with about 120k miles purchased used about a year ago. It has always started but runs rough until warm no matter if it's 30 deg. or 100 deg. outside temp, obviously worse in the colder months especially if not plugged in. I have changed the oil and fuel filter recently. No change in starting though it seems to run quieter and smoother once it's warm. I also used RevX at the oil change.

Is there anyway to know if it had the latest flash short of taking it to Ford and what else can I check myself?
You need to check your FICM voltage. You're showing classic signs of early FICM failure.

Do a search, and start your own tread. Being new I'll give you the benefit of the doubt, but people tend to frown on thread hi-jacking. Good luck!
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Old 11-06-2011, 09:15 AM
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Thanks Daz,

I thought it went along with the topic of Hard to Start which is why I posted here. Posted stuff on another forum (not for this vehicle) and got fussed at for starting a new thread when one already existed. Very confused about when to do that. Thanks again.
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