When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I'm sure someone will weigh in that knows more. What I'm used to seeing for a start condition is an ICP of at least 500psi, but it appears to stay at 0psi. Fuel PW is 0.4ms, so PCM and IDM are in sync, but with no high pressure oil, the PCM is not going to command an increase in PW. ICP duty cycle (is this IPR?) is 50% during cranking which seems like a default value.
Scroll to near the bottom of this document for 94-03 troubleshooting info for the 7.3: hard/no-start link
Oil level is good. and 2 weeks old. WTS light is good. unplugging icp sensor did not start it.
fuses were good.
We put a new motorcraft cps in. I keep a spare in both trucks.
Its not pumping high psi oil. I blocked off both lines and still no psi. The hpop reservoir is full and pukes when u spin with plug out. Oil psi on dash comes up when cranking.
I have 12 v to the ipr solenoid red wire. .2 v on the yellow wire. Measuring red to yellow gives me just shy of 12v.
I am going to remove the ipr solenoid today so i can check resistance on the coil.
I am curious why the ICP duty cycle (IPR) in the log goes right to 50% during cranking, and not a gradual climb. From what I've read, that means the PCM is calling for max pressure from the HPOP (up to 3000psi). I don't have my truck to check these parameters.
Can someone post a graph of a normal startup during cranking, with ICP and ICP duty cycle?
I was so sure that it was the ipr i bought one. Local dealer came close to what it would have costed at Riffraff. Their first price was $313. I measured the resistance on the new coil. 10 Ohms. Old coil was the same. I was not sure it would fix it but i went ahead and installed it. It had me scratching my head as there were no codes except the one i put in it when i unplugged the ipc sensor.
Truck cranked like normal with new IPR. Everything looks good on AE
Examining the old IPR, it looks as though it was a $200 oring set. Pictures attached.
Good outcome here - thanks for posting the results and AE info. Sounds like the PCM was telling the IPR to let the HPOP do it's thing, but with those orings shot, it could not do it? I wonder if you could have seen the gradual deterioration of the IPR orings with elevated ICP duty cycle readings over the last few months. Would AE have given you a heads up? Just thinking out loud.
Great job on pragmatic troubleshooting. Some people would have replaced the injectors, HPOP, and 99 other components before stumbling on the right answer. Congrats!
I have been reading for a long time. I only know the last 14k miles of that truck so I have no idea what all has been done to it prior to that. It has been my son's FFA project. It looked as though someone had tried to keep it up though. If it had built psi with the hoses plugged, the cody test was my next place to go. I did have the little brain fart where i had both hoses plugged and then wondered why the 14 psi on the icp sensor went away (because the icp sensor is in the head and i took all of it away). I wonder why they ever went away from the JIC fittings like the OBS trucks have.
My son and his friend got to experience how hard a cps is when the oring hangs coming out. Told them to take their time and not break it off or it would be a lot more difficult. They changed it in hopes of getting it cranked in the parking lot.
I was so sure that it was the ipr i bought one. Local dealer came close to what it would have costed at Riffraff. Their first price was $313. I measured the resistance on the new coil. 10 Ohms. Old coil was the same. I was not sure it would fix it but i went ahead and installed it. It had me scratching my head as there were no codes except the one i put in it when i unplugged the ipc sensor.
Truck cranked like normal with new IPR. Everything looks good on AE
Examining the old IPR, it looks as though it was a $200 oring set. Pictures attached.
did you get alliant IPR off riffraff site? I found one on the site for $230 shipping included. Dieselorings.com wants almost $400 for an IPR
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
