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Hello all hot as hell here and I am trying to diagnose a high pressure leak. At WOT my edge, and sometimes my CEL indicates DTC 2290. HPOP was replaced by previous owner 35,000 ago. At idle hot ICP is 580 IPR is 22.6. At WOT my IPR will max above 85. At 3/4 throttle I'll be at 74-81. The code is indicated at 85-or above.
So looking through the entire history I noticed that although on two circumstances the truck could have easily had updated dummy plugs and standpipes upgraded it does not show on any paperwork. So I am assuming that the oil rail need to be serviced. I am also assuming that since the IPR is well below 30% at idle hot, the recently is at least working correctly.
I want to do this work myself I am pretty good with the tools and am gathering everything to accurately diagnose this leak. I have also made some assumptions that could very well be wrong . Have oil tested at every change with good readings. 2004.5 184,000 miles.
It seems like a small leak and I might have time to plan for this? Am I doing other damage that I might not be thinking about by waiting? I am basically using the IPR duty cycle as my speedometer right now making sure not to push it to more trouble codes. Not all that hard...sometimes. Can I do this over the weekend? A week? 100 outside
Please correct me at will. Truck starts, runs, idles with no smoke nor hesitation. Fast as lightning, pulled 12,000 of gravel and trailer two days ago.
TIA Tim
P2290 (running code) on a 2003-2004.25 6.0L is most likely caused by, in order of likelihood:
1- Failing, cracked and leaking ICP sensor and oil damaged wiring at the sensor
2- A weak or failing High Pressure Oil Pump
3- IPR valve
Thanks. Did ICP and pigtail. IPR and HPOP did 32,000 ago. I realize these repairs could have failed Or the IPR could have been trashed during that procedure. But should I rule out the dummy plugs, oil rail nipples and seals? Loss of internal pressure would not produce 2290?
It could be dummy plugs or standpipes. The thing that sticks in my mind is that your hot numbers at idle don't look bad to me.
Even though you did the IPR previously, it might have a little trash it it.
A low (or appropriate) IPR % duty cycle at hot idle isn't as much of an indication that the IPR is working properly as it is an indication that you don't have a leak or HPOP issue (at least at those conditions).
Mark- I was thinking that If I was over 30% hot idle I would be thinking Hpop. But at 22-23% I am thinking something else. That's why I am on about. the oil rail. How long would it take a good, efficient mechanic to seals, nipples, injector seals? I'll multiply that by 5 and cross my fingers.
Hold on, is your truck tuned? If so, return to stock, then check your icp and ipr values. The edge programming tricks the pcm into seeing lower icp values, which forces the ipr to compensate.
Mark- I was thinking that If I was over 30% hot idle I would be thinking Hpop. But at 22-23% I am thinking something else. That's why I am on about. the oil rail. How long would it take a good, efficient mechanic to seals, nipples, injector seals? I'll multiply that by 5 and cross my fingers.
A leak and a weak HPOP will produce the same command for the IPR.
Remember the IPR % duty cycle is a commanded value only. It does not represent an actual position. In fact, the IPR valve is a fast-acting ON_OFF valve.
A high duty cycle just means that the desired ICP is higher than the actual ICP. IT could be from a leak or a weak HPOP.
I agree w/ returning to stock. Who knows what tune you have and what impact it has.
OP - I also endorse what others have mentioned (getting it back to stock) and with your mileage approaching 200K it's time to go in there and do general housekeeping on all the o-rings, plugs etc -- pull the valve covers, oil/fuel rails, injectors, pick up the parts kits and zero your mileage (at least in the HPOP distribution system)...............o-rings (Viton) start hardening after 50-60k miles and you're up there...............you'd be surprised what $200 in o-ring, seals, etc parts can do to extend the life of this motor........just takes a little time, effort.
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