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Bluenozer
Top Member
Canada
644 Posts |
 Posted - 04/10/2019 : 10:43:25 AM
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2012 IH School Bus
VIN= CB558666
On a test drive unit will go between 100 feet to 1km before ICP will drop down to 350 to 450 psi log no codes slip it in neutral shut down and restart(while coasting or come to a stop) and ICP will be good for a minute or maybe 5 minutes still no code.
Unit will pass all KOEO and KOER tests no issues
Now for the kicker, when unit first came in I removed valve cover found HPOR feed o-ring leaking bad, so unit has close to 200,000km on it so time for pucks and injectors did this(plus new ICP sensor) ran unit again all test AOk go for road test same condition
Pull the IPR and the tip was missing(plastic piece) thought to myself" HAHAH got you now" , well joke on me same condition
Another tech suggested a HPOP thought to myself "why not" so I R&Red pump pass all tests but still no good on road test
Anyone come across issues like this before , at the stealership We would have log filed it and had engineers look at by now
Any help would be great tow truck coming in the Am to take it to the IH stealership
All components of the high pressure oil system are new except for the manifold itself |
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RonF
Top Member
867 Posts |
Posted - 04/10/2019 : 11:06:20 AM
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| What motor? |
US Army retired CMBT |
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 04/10/2019 : 11:14:42 AM
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| Sorry maxxforce dt and oil level does not go up or down and coolant level does not go down or up |
OEM trained in wiring and all engine platforms for over 20 years
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dsalinas1939
Top Member
USA
1324 Posts |
Posted - 04/10/2019 : 11:47:43 AM
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| i ran into a situation where bus broke down and had only 400 psi at icp long story short i wiggled the ipr connector and the pressure came up and would start ended up being a bad ipr connector it would intermittently have 400psi and then all of a sudden back to normal so check the ipr connector |
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 04/11/2019 : 02:46:25 AM
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new ipr with the new plug end and everything hers what has been replaced
1. HPOR o-ring and six complete pucks
2. six injectors
3. new ICP sensor
4. new HPOP
5. new IPR with updated plug assembly
6. ran all KOEO and KOEO tests no cel set
7. ran all test with valve cover off no leaks(standard puts ICP to 4000psi)
8. will not act up until on road test and ICP just slowly drops down to 400 or so psi and again sets no code . I think it could be a bad ECM but I'm sure they will find it with a break out box
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OEM trained in wiring and all engine platforms for over 20 years
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RonF
Top Member
867 Posts |
Posted - 04/11/2019 : 04:57:39 AM
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quote:
Originally posted by Bluenozer
new ipr with the new plug end and everything hers what has been replaced
1. HPOR o-ring and six complete pucks
2. six injectors
3. new ICP sensor
4. new HPOP
5. new IPR with updated plug assembly
6. ran all KOEO and KOEO tests no cel set
7. ran all test with valve cover off no leaks(standard puts ICP to 4000psi)
8. will not act up until on road test and ICP just slowly drops down to 400 or so psi and again sets no code . I think it could be a bad ECM but I'm sure they will find it with a break out box
What's your engine oil pressure doing while you are on the road test and this happens?
I have a friend in the next county that has had something similar to this happening and it turned out to be the oil pump was shot. It would idle and run in the bay all day long but as soon as you put it on the road it would loose oil pressure and not provide enough to keep the reservoir full for High pressure oil but not low enough to turn on the low oil pressure warning. |
US Army retired CMBT |
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 04/11/2019 : 08:35:22 AM
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| idle 60 psi and hammer down just a bit over 70 psi, starts right up cold , pull oil temp. sensor and oil is right there in housing |
OEM trained in wiring and all engine platforms for over 20 years
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aaronwilmoth80911
Top Member
538 Posts |
Posted - 04/11/2019 : 09:33:52 AM
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| I had one with similar issues. Someone before me had replaced IPR pigtail and did a terrible job with the butt connectors. Best I can guess, when unit would start to get heat under the hood, wires would be flexible enough to cause a bad connection and unit would start to run poor and drop out. |
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RonF
Top Member
867 Posts |
Posted - 04/11/2019 : 10:40:23 AM
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quote:
Originally posted by Bluenozer
idle 60 psi and hammer down just a bit over 70 psi, starts right up cold , pull oil temp. sensor and oil is right there in housing
While you are driving down the road? |
US Army retired CMBT |
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 04/11/2019 : 11:15:05 AM
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| around 70 psi checked my log file its closer to 80 to 85 psi of engine oil pressure before it loses ICP and after |
OEM trained in wiring and all engine platforms for over 20 years
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Edited by - Bluenozer on 04/12/2019 04:02:25 AM |
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 04/26/2019 : 10:48:53 AM
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Stealership it saying it needs a rebuild , they can't give me the gauge reading of the dummy injector for each hole LOL(they have no idea, imagine calling a customer and not having the proof for a rebuild)
I'm thinking it has a cracked head after some research on the side
anyway the manager is looking after it now
How losing ICP while driving came to rebuilding the engine I don't know |
OEM trained in wiring and all engine platforms for over 20 years
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 04/29/2019 : 08:19:59 AM
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| They didn't even take it in the garage, the service adviser went out started it it there was white smoke shut it down and said it needs an engine LOL Stealerships |
OEM trained in wiring and all engine platforms for over 20 years
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jeeptjken
Senior Member
147 Posts |
Posted - 04/29/2019 : 11:27:59 AM
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Currently working on the same issue after pulling the oil pump I found the front half of the front cover had a piece missing that holds the o ring in place letting oil dump right back into the oil pan not when idling but under load it will push past what was left of the o ring this is the second one of these I have had
not saying its your issue just what I found on my issue lol
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How did you get the gosinta in the whatchamacallit |
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Cal Mc
Advanced Member
303 Posts |
Posted - 04/29/2019 : 3:18:37 PM
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I did not see any mention of a Fuel Adaptation Reset. Must be done any time the high pressure oil system has had any work done to it.
We have done 3 engine inframes and 4 camshafts on maxforce DTs all @ between 160k and 220k kilometers. |
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 04/30/2019 : 03:33:43 AM
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jeeptjken , would oil stay up in the front cover after mine messed up(icp low) I pulled the EOT and still oil in cover, I changed the pump and really only checked the gear but never noticed anything in cover
Cal Mc never hear of that test but i will check it out
Thankyou both |
OEM trained in wiring and all engine platforms for over 20 years
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jeeptjken
Senior Member
147 Posts |
Posted - 04/30/2019 : 10:06:49 AM
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Bluenozer it would only supply enough oil to keep the hpop supply cavity filled at idle as soon as you would load it it would die and if you pulled the temp sensor there would be no oil in it this one has made me think way outside the box and work the oil supply from pick up tube forward
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How did you get the gosinta in the whatchamacallit |
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Cal Mc
Advanced Member
303 Posts |
Posted - 04/30/2019 : 1:27:15 PM
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| NOT a test! It is a learn mode reset to allow the ECM to compensate for the change in oil consumption/loss in the high pressure system. As the system ages the ECM compensates for the change in high pressure oil use. If you repair a leak, change a sensor, change injectors the learn mode must be reset or it will run like crap. |
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 05/02/2019 : 08:36:08 AM
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| CalMc did that fuel procedure no change still runs good until the ICP drops to 334psi , shut off restart and have all kinds of ICP for a bit then drops off again , never a hard start either |
OEM trained in wiring and all engine platforms for over 20 years
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 05/02/2019 : 10:41:50 AM
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And I was thinking can't be cracked head , the crack isn't thinking he turn off ignition time to heal for 5 minutes, only two things i haven't changed valve cover gasket or ecm
still no codes either which is leading me to an ecm
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OEM trained in wiring and all engine platforms for over 20 years
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peter2019
Senior Member
125 Posts |
Posted - 05/03/2019 : 08:00:35 AM
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| Bluenozer, if idling bus, then press paddle upto 2000RPM or higher for awhile, ICP still ok or drop? I guess it will drop as same as on road. |
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 05/06/2019 : 07:29:07 AM
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after it gets up to temperature(coolant about 190) it will do it on the floor and on the road and the engine oil pressure stays at 70psi or so on the road and 50psi or so on the floor
tried a ecm of another bus that is the same year , and it does the same, but this one showed code for intake temp. as soon as you hooked it up (its at our mother shop that has all the dealers right there, i operate from a satellite garage in the sticks |
OEM trained in wiring and all engine platforms for over 20 years
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jeeptjken
Senior Member
147 Posts |
Posted - 05/06/2019 : 11:38:56 AM
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| I sure hope you have better luck them I have had I just replaced my 3rd front cover all of them cracked or broken at the oil pump outlet and all dt466 this caused low oil pressure and the pump could not supply the high pressure pump cavity under load so far all are 2009 so a tad older then yours |
How did you get the gosinta in the whatchamacallit |
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 05/07/2019 : 08:19:04 AM
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Now the tech at the stealership thinks it's a check valve in the end of the HPOR , my sister garage is changing it this afternoon, funny it went from needs a engine to a check valve LOL
I figure the stealership must of started a file with iKnow and are in contact with my manager(funny how stories change when a manager gets involved) |
OEM trained in wiring and all engine platforms for over 20 years
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Bluenozer
Top Member
Canada
644 Posts |
Posted - 05/13/2019 : 08:31:10 AM
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Went to unit this morning, not trusting the shop the unit came from I performed a full service to unit, warmed up unit for road test and guess what no ICP issue on that road test, so I went for another still no issue ALL THIS for either bad oil(the other shop says it does a service but it was only done on paper) or a cheap aftermarket oil filter failing internally(couldn't see any thing wrong with filter but I did not cut it open) anyway it does not lose its ICP now , did a cylinder cut out test all cylinders seemed to be even
I will change the crankcase filter and install an OEM DPF on it and see if those items clear up the light smoke from exhaust
Thank you guys for your input with this issue
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OEM trained in wiring and all engine platforms for over 20 years
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Topic |
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ICP pressure 2012 IH
