Rough running 6.0
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New User
Joined: Dec 2007
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From: Kansas
Rough running 6.0
I have a new to me 2004 F-350 6.0 that has just started running rough. Loss of power and stumbles bad. It happened when the truck was at operating temperature and driving. It progressively got worse through the day as I drove it, to the point where full throttle would not move the truck.
Any ideas on what to check or look at? I am trying to avoid the dealership for money reasons. Any help is appreciated. Thanks.
Any ideas on what to check or look at? I am trying to avoid the dealership for money reasons. Any help is appreciated. Thanks.
Tuned
Joined: Mar 2007
Posts: 365
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From: Alberta, Canada
Best armchair diagnosis would be an ICP (Injection Control Pressure sensor) or IPR (Injection control Pressure Regulator) valve. These have both caused the symptoms you are describing. Any evidence of excessive smoke? If it was smoking like a freightrain you may have a stuck EGR.
Hope this helps.
Hope this helps.
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New User
Joined: Dec 2007
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From: Kansas
I replaced the fuel filters and No luck! Still runs like crap. Where are the ICP and IPR?? Is there a test I can do with my multimeter on those?
Bigredtruckmi>>>>Was it just bad connections on the wiring harness or did it have to be replaced?
Bigredtruckmi>>>>Was it just bad connections on the wiring harness or did it have to be replaced?
Tuned
Joined: Mar 2007
Posts: 365
Likes: 0
From: Alberta, Canada
Sadly no, the ICP and IPR tests are all performed with a scan tool (IDS or similar). You could maybe run down to Autozone and have them pull the codes for you and see if you have any DTCs. Many DTCs do not set your CEL so there's a possibility you may see something.
Have a look at the 6.0 Bible in the tech folder, it has DTCs, component locations etc. It's a very helpful document.
The ICP on your truck should be on the passenger side valve cover towards the front of the engine (this is different on the 2004 MY up engines). The IPR is on the drivers side basically right underneath the up-pipe. It's a bit of a PITA to get to.
The engine harness issue usually requires replacement of the harness because it is chafed.
Have a look at the 6.0 Bible in the tech folder, it has DTCs, component locations etc. It's a very helpful document.
The ICP on your truck should be on the passenger side valve cover towards the front of the engine (this is different on the 2004 MY up engines). The IPR is on the drivers side basically right underneath the up-pipe. It's a bit of a PITA to get to.
The engine harness issue usually requires replacement of the harness because it is chafed.
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Lead Driver
Joined: Jan 2005
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From: Huntington Indiana
Originally Posted by trucker33
I replaced the fuel filters and No luck! Still runs like crap. Where are the ICP and IPR?? Is there a test I can do with my multimeter on those?
Bigredtruckmi>>>>Was it just bad connections on the wiring harness or did it have to be replaced?
Bigredtruckmi>>>>Was it just bad connections on the wiring harness or did it have to be replaced?
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New User
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Originally Posted by 04Xcursion
Almost certainly ICP or IPR then.... One other possibility: clogged fuel filters.
New User
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Here's a link for the harness http://www.forddoctorsdts.com/articl...icle-05-11.php.
Also as someone mentioned in an earlier reply I'd have the codes checked. That should give you a good starting point.
Also as someone mentioned in an earlier reply I'd have the codes checked. That should give you a good starting point.
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