My 2004 F250 has about 95K miles on it and the engine occasionally Sputters & revs up . This is going on since a couple month now and it seams to be getting worse. When it started I immediately changed the Diesel filters.
The Water separation one under the driver side was black with plenty of debris on it and I thought that was causing the problem, but unfortunately it doesn't seam to be the root cause.

The rev up part feels really weird as its like I push down the gas pedal. I watched the rev up on the scangauge and its about 200 to 300 RPM. It just does this once in a while and when its in that mood it also sometimes shuts down the engine e.g.: when I idle at a light. But the engine will immediately restart. It never shuts down when I drive. Then it shutters.

Also I noticed that it seams to be related to how many gas I have in the tank. When I am below 1/4 then I can put my money on it that it will start doing that. When I fill up it very rarely happens.

Any thoughts?
Thanks

 

Check the ICP voltage with the SGII. Mine did the exact same thing when the sensor was failing. Volts were jumping around from 0.02-1.22. This post has some good information on troubleshooting the problem. My failing sensor did not have the usual symptoms of leaks or oily pigtail connector. Running through that checklist narrowed down my issue quickly.

 

My ICP sensor was doing the same thing when it started to fail. Driving down the road you could feel the truck momentarily cutting out but it still drove ok. It was obvious until you either stopped at a light or stop sign, then the engine shook and couldn't maintain a consistent idle. As soon as I replaced my ICP sensor, it was good to go again.

Quick test:

-If your truck is a late 2004 truck, the ICP sensor should be on the passenger side valve cover. Unplug the sensor and start the truck, if it behaves somewhat normally, replace the sensor.

 

fixxxer-upper:
Thanks for the quick response.
I do not have a check Engine Lighton. Do you think I will have a Code present when I check with the Scangauge II ?

 

Toreador_Diesel: Thanks to you as well.
Can I just idle the truck when I disconnect the sensor or also rev it up and drive with it.
I just hope I don't have an early 2004 model.

 

You can disconnect the sensor, idle, and even drive the truck with the sensor unplugged. With the sensor unplugged, it defaults to a certain value that allows the truck to start and limp-home. Don't expect an insane amount of power with it unplugged...

 

You could be getting air in your fuel if the hiccups are most noticeable at a 1/4 tank. Or your fuel sending unit is giving your false information. Thus your almost out of fuel when the gauge is telling you that you've 1/4 of a tank.The '03 & '04 trucks will have store codes long before they light up the CEL. The emission codes will set the light right away...but there's dozens of others that won't.
I don't think you can drive with it unhooked, never heard of anyone trying that. I just know that when you unhook the ICP the PCM goes to a default value for HPO and will adjust the IPR accordingly. ICP issues is one of the few times the late '04 and up trucks have it easier.

 

OK guys. I just checked a couple things.
Lucky me, I do have a late 2004 with the sensor on the passenger side valve cover.

I found this on eBay for pretty cheap will that work or do I need to install a new harness with it?
ICP Sensor FORD 6.0 E F250 F350 F450 F550 04 05 06 07 | eBay

Unfortunately the scangauge is not giving me any codes. So I need to test the disconnection method.
But I am not sure how to gauge it as the problem doesn't exist all the time. My question is do I need to wait till it the problem occurs and then jump out of the car and disconnect the ICP or how should I do it?

 

I used my Predator Diablo at home to read the OBD at to my surprise it picks more up the the Scangauge2:

<table border="0" cellpadding="0" cellspacing="0" width="652"><colgroup><col style="width:48pt" width="64"> <col style="mso-width-source:userset;mso-width-alt:12316;width:260pt" width="346"> <col style="mso-width-source:userset;mso-width-alt:8590;width:181pt" width="242"> </colgroup><tbody><tr style="height:14.4pt" height="19"> <td class="xl65" style="height:14.4pt;width:48pt" height="19" width="64">Code</td> <td class="xl65" style="border-left:none;width:260pt" width="346">Desc</td> <td class="xl65" style="border-left:none;width:181pt" width="242">Notes</td> </tr> <tr style="height:14.4pt" height="19"> <td class="xl65" style="height:14.4pt;border-top:none" height="19">P0336</td> <td class="xl65" style="border-top:none;border-left:none">Crankshaft Position Sensor A Circuit Range/ Performance</td> <td class="xl65" style="border-top:none;border-left:none">
</td> </tr> <tr style="height:14.4pt" height="19"> <td class="xl65" style="height:14.4pt;border-top:none" height="19">P0403</td> <td class="xl65" style="border-top:none;border-left:none">Exhaust Gas Rec</td> <td class="xl65" style="border-top:none;border-left:none">Believe that’s because of missing EGR</td> </tr> <tr style="height:14.4pt" height="19"> <td class="xl65" style="height:14.4pt;border-top:none" height="19">P0405</td> <td class="xl65" style="border-top:none;border-left:none">Exhaust Gas Rec</td> <td class="xl65" style="border-top:none;border-left:none">Believe that’s because of missing EGR</td> </tr> <tr style="height:14.4pt" height="19"> <td class="xl65" style="height:14.4pt;border-top:none" height="19">P1000</td> <td class="xl65" style="border-top:none;border-left:none">OBD System Read</td> <td class="xl65" style="border-top:none;border-left:none">
</td> </tr> <tr style="height:14.4pt" height="19"> <td class="xl65" style="height:14.4pt;border-top:none" height="19">P2287</td> <td class="xl65" style="border-top:none;border-left:none">Injector control Pressure Sensor</td> <td class="xl65" style="border-top:none;border-left:none">
</td> </tr> <tr style="height:14.4pt" height="19"> <td class="xl65" style="height:14.4pt;border-top:none" height="19">P2617</td> <td class="xl65" style="border-top:none;border-left:none">Crankshaft Position Output Circuit / open</td> <td class="xl65" style="border-top:none;border-left:none">
</td> </tr> </tbody></table>
I believe that this is good news as it lists the P2287 code. Now I can go and do the test as descibed by fixxxer-upper.
Can you guys please let me know if the sensor listed in my previous reply will do and if I need the new connector / pigtail as well?

 

P2617 Crankshaft Position Output Circuit / open

P0336 Crankshaft Position Sensor A Circuit Range/ Performance

If you unplugged the ICP sensor, that would explain the code for it, but the codes above are what concerns me.

It leads me to believe you either have a wire chaffing on your Crankshaft position sensor harness or the sensor itself needs to be replaced. I don't remember where it is on a 6.0, but I remember it being in a not so friendly place to get to.

 

You can set up the SGII to monitor ICP Voltage, crankshaft sync, and cam sync. This will give more insight on the P2287 and P2617 codes. Inspect the pigtail for contamination, damage, or loose wires. Repair or replace as needed. Good luck.

 

Quick update.
It turns out that it was the ICP sensor.
I bought a new one @ ebay for $42.95 incl. shipping installed it and the problem disappeared. No need for a new harness one my truck.
If anybody needs the part number is # 4C3Z-9F838-A.
Thanks for your help guys.

 

Awesome news!

Did you end up having a late '04 motor with the ICP on the passenger valve cover?

 

Yip, in post #8 he said his ICP was in the right hand valve cover.

It's amazing how much the ICP can/will effect the engine.