I need some help everyone. I tried posting over in the Excursion forum hoping that it was an easy fix, like turning on my headlights to kick on the AC, but no luck so far. This is my wife's daily driver so I've got to get it done this weekend. 05 Excursion with 04 motor, 95,xxx miles. No problems until Friday. My wife drove to Seattle for a physical therapy appointment for my daughter and when leaving she said it felt like it was idling a little weird. She was at a stop light and when it turned green she could barely move, no power. Called me and everything sounded good from the Edge. Had the truck towed from Seattle to our house, about 60 miles. Idles really rough in drive, smooth's out a bit when in neutral. Starts totally fine when cold or hot, but doesn't start acting up until at working temp. When I say there is no power I mean the truck won't even pull up our drive way that only has a slight incline and is the length of the Excursion. Only code I get is a P1000, but that is always on the tuner for some reason. I pulled the upper fuel filter and I'm getting fuel. Checked all the fittings I can see and nothing electrical seems out of the ordinary. New IPR and ICP within the last year. Tried disconnecting the EGR and it ran the same, but threw a P0403 and P0405 code. I've tried researching this and can't seem to find anything having to do with loss of power when hot. Sitting in the street in front of the house with the truck running I show an ICP of 750psi IPR of 28% @ 680 RPM VGT is 64.6 and MAF is 44.0. I can hear the turbo whistle, but show 0 boost which I think is normal when no load. I tried pulling into the drive when at temp and the truck was hitting 1000 rpm with pedal to the floor and wouldn't move, shaking and rough the entire time. I'm at a loss and need some help, any info or ideas would be extremely appreciated. Before all this my delta on EOT and ECT were under 5*

 

IPR at 28% idling.... thats a pretty good leak or your HPOP is toast. It should be 21-23% at 650 rpm and ICP at 580-650.

ICP is the valve cover? Dummy plugs, stand pipes or the pump as you don't have the STC fitting.

 

Sorry, that should say 23%, cant seem to read my own handwriting. I don't think it's a HPO issue because the percentage and the pressure seem to stay consistent with each other. It is definitely higher than the 21% that it normally sits at, but it's bouncing around with the engine running so rough.

 

750 ICP at idle, if warmed up, seems a tad high to me.

Double checked the three plugs on the FICM?
Runs any different with the ICP unplugged?

Does it actually have some power right after she fires up? or fall flat on it's face straight away?

 

Up until it warms up I can drive around. This morning when I went out and fired it up I was able to drive around the block. Warms up and it barely moves. Turn it off and starts up fine, but then goes right into a rough idle and no power.

 

What are you seeing for ICP and IPR during this short time it actually moves?
Almost like it is losing oil pressure once it warms up a little bit. Not enough that it won't restart but a big enough leak it won't allow good running after it thins out.

You might want to think about doing an air test to check for any leaks.

Post up ICP and IPR on cold start cranking, and hot start as well.
Does it crank longer on a hot start?

The fact it idles rough in drive but not as bad in neutral tells me that just that little amount of load is starving something, somewhere.

 

My early HPOP was Dead at 23% IPR when at Temp of EOT 185*+
It would run but Terrible about same as Your symptom
WOT my IPR% would hit the Classic 77%


Post ICP as Mentioned^^


And when it wont go when it comes to normal operating temp and Failure is Obvious
At this time Post
Idle ICP & IPR%
and Again at 2500RPM ICP & IPR%

 

Ever did you Stand pipes and Dplugs


And one More Check of ICPV @ KOEO

 

Just got back from a graduation party so I will check this stuff tomorrow. I can say that while the truck was sitting still I was able to run the RPM up with no load and the pressure raised concurrent with the percentage. Didn't write it down, but I believe the pressure got up to 3800 psi and the percentage was around 79-80%.

Yes, stand pipes and dummy plugs were done last year when I had to diagnose a HPO system leak which ended up being an o ring in the HPOP. $0.37 later and my truck started right up. The HPOP is a DieselSite unit, I have a hard time thinking that would be bad, but you never know. I'm going to see if I can piece together stuff to test the fuel pressure tomorrow. Right now I have a standing appointment to have it to the dealer on Thursday to flash the PCM because the Edge tuner lost the original tune somewhere along the line. If I don't have the issue resolved by then I think I'm going to have to have them diagnose it. I have to get my wife her daily driver back, my daughter has a lot of doctor appointments to make.

 

Think I will be changing the fuel filters for the hell of it also. Could a symptom like this be as simple as a fuel filter? I'm getting fuel to the secondary filter in KOEO, but I don't know if it's getting enough while running without a pressure test.

 

Got your PM and here I am.
Lets see what we can come up with.


Steve can you answer this small laundry list of things?

Do you have access to a compressor? I think at this point you need a cold air
test and a hot air test.

Also have you checked the fuel pressure?

BTW do you have a magic temp where it dies at?

I could come up and bring the VCM2 and the laptop with IDS on it
if we can come up with a time that will work. I tend to be an afternoon
person aka : Swing-shift. The key is the compressor access.

One test I would like to see you do is the one where you unplug the
ICP sensor and let it run on default pressures and see what that does.




Sean <BR>

6.0L Tech Folder

 

I have a compressor and the fittings to remove the ICP and run a pressure test.

The truck never actually dies, just idles like crap.

I do not currently have the ability to measure fuel pressure, but starting to think that is a high percentage culprit.

I will unplug the ICP tomorrow and see how it runs. I think I did that this morning and nothing changed, but will confirm tomorrow.

 

Forgot to ask. Do you have anything to read live data?
Scanguage 2 will do the job for what we want.
Also would like to know what the Starting (Cold) FICM voltages are
along with the up to temp (Hot) FICM voltages are and if you see any
dips in the voltage.



Sean <BR>

6.0L Tech Folder

 

maybe its time for another .37 part


was it teflone backed oring

 

Okay lets see if I can lay all this out in a fashion that is understandable.

This morning I changed both the fuel filters before doing anything. Cycled KOEO about five or six times and the truck fired right up and ran fine. Also turned the truck back off and jumped the starter to the positive post to make sure I had a nice consistent turn over and not a dropped cylinder. Listened for the injector buzz and it is a nice consistent buzz all the way though.

Readings right after firing up:
670 RPM
12.9v
46.5v FICM
VGT% 85
ICP 765 PSI
ICPV 1.0
IPWms 1.03

Ran up to 2200 rpm
IPR 38%
46.0v FICM
1300 PSI
ICPv 1.6

Warmed up at idle
650 RPM
IPR 22%
46.5v FICM
13.2v
ICP 615psi
ICPv .9

Drove the truck around the block and parked in front of the house and it started again.

Parked in neutral
EOT 153*
ECT 160*
645-670 rpm
IPR 21%
ICP 580
ICPv .9
13.5 v
47v ficm

In drive with emergency brake set

EOT 159*
ECT 164*
619-687 rpm
ICP 850psi
ICPv 1.2v
IPR 29-30%

Ran up to 2500 RPM while in neutral
13.6v
46.5-47.0v FICM
IPR 51%
ICP 1825psi
ICPv 2.6v
3 pounds of boost

I unplugged the ICP and the truck seemed to run the same
The replacement o-ring that I used was the factory replacement from the International Dealer.
I currently don't have a way to test fuel pressure and don't see it happening in the real near future. I am thinking I should just buy auto ingenuity for the laptop though. That will be a tough sale with my wife though.