So I have been reading on this site for a little while now but just signed up today, my name is joe, from MA, and I have a 2005 F350 crew cab Fx4, used daily for work (construction) all I have done is 4" turbo back exhaust, no CAT, egr delete, and sct tuner. Couple days ago I noticed that when I stepped on it a little bit it wouldn't have that instant power it would stall for a few seconds, and the boost would shoot up all the way to like 30 but there just was no power. After that I started noticing the idle at neutral was a little rough too. A few hours later, it died at a light. This kept happening all the way home and by then there wasn't even enough charge to start it again. So I tested the ficm first, put out 46v with key on and through injector cycle, battery's are less than a year old, I hooked it up to a snap-on Solarus ultra, got p2290, got voltage out of range, did an injector buzz test, that didn't throw any codes. So next I checked the alternator, and that was only charging at 8-9. Could the alternator be the cause of all these other problems? Any thoughts are greatly appreciated. Thanks!

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Ok had alternator tested, was no good. Replaced it still same problem. Running rough. Also I was listening with hood up and the turbo is vibrating every like 30 seconds or so, strange noise and it looks like the heat shield is vibrating causing the noise. Any ideas?

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Could the turbo noixSe just be the veins cycling?

 

Check your icp sensor it should be on your valve cover. Make sure the sensor isnt spilling out oil.
P2290 is your icp pressure low

 

Two ways to check this, one is to monitor ICP actual, ICP desired, and IPR duty cycle on a scanner, OR, hook up shop air and see if there is a leak.

Before you do that though, inspect the ICP sensor like suggested, you can try unplugging it too and see if it makes a difference. With it unplugged the PCM just defaults to 2000psi icp pressure. You'll be able to start it and move it, but I wouldn't really try driving it, it's more of a limp it home kind of thing.

 

I tried to Find a pic of the ice sensor but no luck. Anyone have one? Also what should the icp actual be? Should just match icp desired on the scanner? Thanks

 

ICP sensor is in the passenger side valve cover, it's the only thing that literally passes right through the center of the cover, you can't miss it. It's threaded right in to the top.

Yes, you need 525psi of ICP to fire the truck. Running and driving it will fluctuate as you lay into the skinny pedal, it should go near 4000psi at WOT. ICP desired is what the PCM is asking for, based on your right foot and a few other parameters, ICP desired is what the pump is actually putting out, so they should be very close. If you find you're getting something like 1500psi desired and 300psi actual... the truck wont start because you have a high pressure oil leak or a bad pump. IPR duty cycle will normally start low at around 15% or so and creep up as you keep cranking to try and get more oil flowing. It's just a valve that allows oil to pass based on how much you need. Unplugging the ICP sensor eliminates the sensor as an issue, if it's bad it may be sending false signals not allowing the truck start. Unplugging it, the PCM defaults to 2000psi and the truck should fire right up and idle fine with that much pressure.

 

Ok I'm at idle right now 700 rpm icp dsired 602psi actual 549. Injector prs reg % is at 85%,

Numbers don't seem to change much when I unplug icp. Is that mean its ok?

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I don't know. Idling like complete crap, cuts out every 5 mins or less. No oil leakage around icp. Turbo is making a real strange vibrating sound... Don't know if that's normal

 

IPR shouldn't be that high at idle. Either the IPR valve itself is stuck, or there is a high pressure oil leak and the IPR is trying to compensate for it. I'd start by pulling the IPR valve. It's kind of a pain and you need a special socket, but it's do-able, even for a beginner. Unbolt the coolant bottle and shove it to the side. On the drivers side valve cover is the FICM (fuel injection control module), unbolt that and unplug the 3 big clips on the bottom, pull that out of there. The IPR is behind the turbo on the back of the motor area. You can make your own socket for it if you wish, it's just a regular socket with a slot cut in it to go over the electrical connector.

 

If there was a high pressure oil leak would I notice it? Would I physically see it leaking out?
And not sure why it was at 85. Next couple tests it was fine. This truck is driving me crazy and I don't wanna just buy parts

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So I eliminated the icp sensor as a possibility. Popped anew one in and nothing changed. Still no power when I give it gas. Idles like crap. Ipr % seems fine maybe 85 was just an anomalie. I'm about to give up and bring it to the stealership. Anything else I could try? all these members and no one else has any ideas!

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Oh and mdub I will check the ipr valve anyways. Thanks for all the input.

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And pulled about 5 new codes, p0113, p2285, p0336, p0606, p1102