I have an '03 F350 dually 6.0 with 127k miles, I've had it since about August of last year with no problems what so ever with the exception of a new starter. Friday it died and wouldn't start but eventually started back up after about 5 minutes or so, I got a P2285 code for the ICP sensor and thought I would replace it soon but today it completely lost acceleration out of no where and I had to floor it to keep it from dying and eventually it got to the point where it just died from no acceleration what so ever, it wouldn't at all so I got someone to bring me starting fluid and I got it to start but it barely got me home which was about 2 blocks away from where it died. I started looking online and saw that it might be the EGR Valve wrestled with it for about an hour and it had quite a bit of carbon build up in it so I cleaned it off, put it back in and tried to start it up and it wouldn't, it just kept cranking and wanting to start but once I sprayed a little bit of starting fluid in it and it cranked up but died after a few minutes. Any ideas? I'm thinking of disconnecting the ICP sensor tomorrow and seeing if it starts up.

Well I went out to give it a try this morning and it started up about the 4th or 5th time and it didn't sound right, there was no whistle from the Turbo at the exhaust and when I would press on the accelerator nothing would happen but when I would put the brake it would decelerate and die out. I called the Ford house this morning and they told me they can't get it in until June...

Also, even if I have the accelerator all the way it won't jump in RPM's or anything it's like i'm not doing anything and pressing the brake makes it die out. It won't throw black smoke anymore because it would only smoke when I could make it accelerate and it won't do that anymore.



Sorry if some of this is out of place I copied and pasted parts from other forums because they're no help and/or no one has replied

 

Might have had the High pressure pump die on you, try unplugging the icp like you were talking about, it sets a default to the computer of 2000psi for the icp pressure. If that doesn't do it you can pull the IPR valve and see if the screen is clogged or busted, if it is the either clean or replace the busted screen. If you could have it scanned and monitor - ICP actual and ICP desired as well as IPR duty cycle it will tell you if your High pressure pump is bad. It needs 500psi for the injectors to fire.it will run as high as 4000psi at full throttle.
Check the free stuff first but I am thinking it is a high pressure pump failure, the pumps are over $500 but it is a project most people that know how to use tools can do in a day and a half, once you do it once you will be able to do it in 6 hours.

 

I don't think it's the HPOP because it will start hot or cold, I read something that said if the HPOP is bad it will only start cold. I talked to someone at my college that's in school for diesel mechanics that said it sounds like it's the fuel filter is clogged so i'm gonna take both filters off tomorrow.

On the ICP would I just pull the pigtail or take the sensor completely out?

 

Just pul the pigtail /connector/ off the ICP sensor. Yes clogged fuel filters will definately cause the same problem, shame on me for not suggesting that. they should be changed every 15,000 miles. and even more frequently if using off road fuel from a tank, that stuff always seems dirty.

 

Well I changed all the filters today and the one under the hood was pretty clean but the one under the driver side was really bad, almost solid black, then I replaced the O-rings on the EGR valve and really deep cleaned it until it looked like new. I seems to sound a lot better now, the Turbo kicks on now ( it sounded like it did ) but it still won't start. I can't seem to find a way to disconnect the ICP unless I take off the FICM, Turbo, etc... I really don't want to do that because i've never done it before and don't want to screw anything up more than it is. I tried to crawl under it and see if I could find it but I couldn't see it, the truck isn't lifted so there's not very much room to move around any...

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I just don't understand why it won't accelerate and pushing the brakes makes it lose RPM's and die instantly...

 

if you remove the air filter assembly and then drain about 2 gallons out of he radiator then you can remove the degass bottle, next remove the very back intake bolt that has the ground wire on it, that bolt cuts into your arm, then you can see the ICP sensor right behind the intake, it screws in from the drivers side, the one that sits in front of it and under the bottom of the crossover of the intake is the IPR valve. keep inmind if you ever planon removing the intake do yourself a huge favor and buy a intake off a late 04 to an 07 intake, gives you all kind of room to get to these parts, that crossover tube is a pain in the ***, the newer intakes bolt right up, see them on ebay for $85-$100 all the time.

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PS. have you tested the FICM, easy to do and could be the cause as well.

 

I don't have a voltage tester