This is the test logs from Forscan. A snapshot of the PIDs with ICP plugged in (the very high readings), and a snapshot of the PIDs with the ICP unplugged (the 5,000 KPA reading)
Thanks for the reply! I did buy my ICP from Ebay. It was a US seller with great reviews that claimed to specialize in new OEM 7.3L and 6.0L parts since 1999. It seemed legit, but maybe not! I was thinking that would be the next thing to replace again if I dont get a definitive answer on something else to check.So first,,, you know how simple it is to change the ForScan configuration to Imperial? Stop with that kPa stuff already!
Next, those ICP values are suspect to me. The 750psi at Idle is the default, and you're not going to see 3,500psi from it so, and I HATE to keep beating-this-Drum,,, but Where Did Your ICP Sensor Come From? (I know, they're supposed to be Genuine OEM FORD, in a blue bag, sensors but did ya buy them online???)
How many Miles on your Injectors?
Is there any rhyme or reason as to why my truck runs even worse with the ICP unplugged though? I agree with the ICP being faulty from the crazy numbers I am getting at idle, but it puzzles me why it gets so much worse when it's taken out of the equation. Once it's uplugged, the truck cranks for 15-20 seconds before it'll start then sounds like it's only running on half the cylinders at idle (barely enough to keep it running). It smooths out a little when revved, but still goes back to a very significant miss at idle. I've always heard if the ICP is bad, it should run better with it unplugged. Any idea on that?Yea so, unfortunately,,, the market is flooded with Chinese counterfeit sensors that look just like what you would buy at the dealership (except they sell for $30 instead of $150, and worse yet, you could pay $150 and still be sent a $30 sensor!).
I would only buy from a dealership (and there shopping online is OK) or a Real, Diesel Specific, vendor (there are several on this site, CNC Fab is active in the 7.3 forum and linked in the "Vendor Member Forum" below). I understand shopping for the best deal, I do all the time and take pride in getting a really good deal, but sometimes "too good to be true", like a ICP for under $100, is the rule.
Your Injectors are considered High Mileage and getting pretty tired. This will mean harder starts, especially Cold, and probably increasing driveability issues but, they're Expensive! Ride 'em out some until they become a bigger issue if you need...
Still learning this Forscan deal and I couldn't figure out how to post a good representation of the start-up numbers but on cold and warmed up start:No, you're right! That isn't what I'd expect either...
When you start, maybe compare a Cold Start with a Hot reStart for these paramaters;
In any NoStart condition we want to monitor these 4 Important parameters while Cranking on the Starter;
ICP Pressure ~ (in PSI plz, the PCM requires something over 500 before it will trigger the IDM to fire the injectors)
IPR% ~ (shows how Hard the system is having to work to make that ICP pressure)
CRANKING RPM ~ (PCM requires above 100rpm ~ 150 is typical)
CRANKING Voltage ~ (in an '02 PCM requires it not drop below 9v, in a 2000 and under not below 10v)
It's hard to read the pic in your post with the Scan Codes results, but do I see a 1211? THAT's an indication of HiPres Oil problems (most often Low ICP) but you should be Clearing Codes to remove Historical issues so to focus on Current problems.
Clear Codes, see what comes back first when you're cranking to start...
I've still got my original IPR valve, but the ICP found the trashcan as the connector was full of oil so I didn't figure it was worth holding onto. I've got a buddy looking through his spare parts from his old pulling truck to try to find a good ICP laying around to test before buying another. Wish I would've had Forscan before I swapped the parts out so I could've got some baseline readings before throwing the "probably false OEM" 🤦🏻♂️ Ebay junk at it. My friend who checked it initially with AE for the no-start issue said everything looked good pressure wise at that time so I'm sure the original ICP and IPR were not maxed out while cranking as they are now.The only reason to look at the batteries are if you can't maintain Voltage or RPM, if so Move On to something important. In Any case 10.5v will not interfere with starting or running...
I again, don't believe the ICP and the fact that the IPR% maxes-out (and that 65% is Max) means that the PCM was unhappy with ICP pressure. IPR% should Never go above @45%
Then you got a recurring 1211, you have a HiPres Oil issue as far as the PCM is concerned. With your mileage, if this is a Real issue (and not due to a bad ICP, which I really do suspect you have) then this will most likely be an Injector O-ring bleeding off too much HiPres Oil. This all assumes that we can believe that the IPR's doing its job and because there is no feedback from it, all were seeing is what the PCM is commanding it to do (and if this is another eBay sensor, who knows?)
Did you throw away your old, real, sensors?