Left Thursday afternoon for a long weekend camping and broke down 15 miles from home. Truck stalled and would not start again. Had it towed home and borrowed a friends truck to still go camping. I scoured and searched a lot over the long weekend trying to figure things out.

The truck is a 2003 Excursion with a 2005 motor. It has been studded and EGR deleted. Truck has 155,000 and not 100% sure on the motor. All oil and fuel filters have been replaced within the last 3000 miles using the Ford Motorcraft brand filters. Is running a SCT Tuner and was running the towing tune at the time. Like a dummy I didnt have my tablet with the Torque Pro app running at the time but all factory gauges looked fine. No running problems prior to this stall.

I did a scan and came up with a Code P2623 - Injector control pressure regulator circuit open and a few others for the EGR valve which has been deleted.

Got home from camping and did some of the tests according to the troubleshooting steps I found out here. Here is what I found:

FICM Voltage 47.5
Batteries at 12.1 with a low of 9.6 while cranking.
IPR Low value 14.7 and High Value 83.9
ICP Low value (KOEO) 50.7 and High 277.6 PSI
The weird thing about my ICP is the second time I tried it while cranking it never changed from the 50.7 value but at one time it did go to 277.6.
I also tried unplugging the ICP plug and cranked with no success. The ICP value did go up in the 1200 range while cranking with it unplugged though.

I assume that I am having some type of HPOP problem. I am going too order the fitting to do the air test to see if I can find a leak.

Am I on the right track so far or totally off track? Anything else I am missing? Thanks fro any help or suggestions.

 

Do you have another ipr that you can swap in to try? Otherwise I would air test it and see what you find.

 

No I dont have one unfortunately. Did read right that the fitting I need to air test is the same as the fuel test fitting?

 

Pick up the OTC 6763

 

Is the IPR socket worth getting also?

https://www.amazon.com/Lisle-68210-S...D14R1A2DD0Z8PR

 

I did forget to add the FICM sync was at 0 with KOEO and at 1 while cranking and the same with the C & CR sync.

 

This is the first I've heard that the threads for the fuel port are the same as the ICP threads and I can test pressure using the same fitting if I have a pressure gauge. This is awesome if it is true. One less thing I need to buy!

 

Excursion with an 05 motor. Is the motor out our another excursion or from a pickup. ICP is way low. If from a pickup, sounds like an STC fitting on the hpop. Air test to confirm. If from another Excursion, it could be the old style motor and hpop cause they put the 03-04 motor in those till 06 or so.

I don't think the fuel port threads are the same as the ICP. If memory serves, the ICP is much bigger.

 

I am assuming it is out of a truck because it has the newer style HPOP.

 

The first thing that needs to be addressed is the IPR circuit open or it will never start.

 

Can you point in the right direction? I will address as soon as I get home from work today and post any findings.

Still reading, searching and learning here for sure.

 

Teach me something here. I saw where he posted the icp circuit was open as a code but cleared it because he thought it was an old code. Plus, that's ICP, not IPR. How can the ICP or IPR circuit be open if he is reading values for each during cranking. Perhaps the IPR reading is a command value.

 

I didn't look up the code, he stated in his first post that it was the " injector control pressure regulator circuit open" he would still have numbers as the IPR is a commanded value not actual valve position.

 

I would pull the IPR valve and look for a damaged screen. You will need an IPR oring kit that comes with a new screen. You can flush the IPR valve out by holding the valve plug open by pushing it open with something that won't damage the valve internals through the end of the valve and flush it good with WD-40 or something similar. You can check it on the electrical side by checking the ohms across the the pins with an dvm, I'm not sure what the value should be but any numerical value is better than an OL or OR as it means the circuit is open in the coil which means you need a new IPR. Maybe one of the guys will chime in with what the ohm reading should be.

 

Brian,
ICP is commanded
IPR is commanded
ICPV is actual

IIRC on those sensors.

Brett is on it.. IPR is open, could be a bad wire to the IPR, maybe melted to the intake? ICP would have been P2285, low Injector Control Pressure (not the regulator).