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Old 04-20-2019, 08:03 AM   #41
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this is a HEUI engine there is no injection fuel pump.. it has an HPOP oil pump but its not throwing an HPOP / ICP code.. the code is tossing is the IDM which is the electronic device that generates the 110 VDC to drive the injector solenoids..



is this engine "making oil" meaning is the oil level going up? does the oil smnell like fuel at all?


ive seen a bad injector cause overloading of the IDM circuits and pull the voltage down.. thast same injector can be dumping fuel into a cylinder which ends up in the oil, dilutes it and causes the level t ogo up / oil to smell like fuel..



another thought is does the exhaiust smell like burnbing diesel or burning engine oil? the smoke color to me looks like diesel smoke and not so much oil smoke, but cameras dont tell all..



the way this engine works is the HPOP (second oil pump) builds up a much higher pressure in respoinse to the computer via the IPR(injection pressure regulator).. and is measured by the ICP (Injection control pressure sensor). that high pressure oil is used to actually push the plungers in the fuel injectors... the computer uses the IDM (Injector driver module) to generate the electronic signal which actuates the solenoid in the injector to allow the high pressure oil to press the plunger and inject fuel into the cylinder..



Over-volting the ECM can damage or destroy the electronics within it, though they tend to be hearty..



battery chargers in and of themselves usually wont damage an ECM, however if a battery charger is used with no batteries.. (ie you are using a high power charger as a jumper box), then the voltage can spike high when you turn the key before the starter enggages..



an alternator that is gone rogue or one run in SI mode where the sense wire is partially bad.. (gets some voltage) can spike up to 16-18+ volts which will trigger that BAT+ error code in the ECM...



i'll have to look up the troubleshooting procedure for that IDM code.. I dont remember off hand what the procedure is.. however the smoke and this code seem to me related as it is injector related..



if the smoke is actually oil burning and not fuel.. (renember the old burnt oil smell of someone's old car) then ive seen injector O-rings being the cause..


I dont know if that scan gauge will read out the desired and actual ICP values or not.. but we arent getting any codes against the ICP not matching the IPR so i suspect that piece is working fine..



-Christopher

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Old 04-20-2019, 08:56 AM   #42
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It will read icp but it needs to be programmed
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Old 04-20-2019, 10:05 AM   #43
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But can it read desired ICP and actual ICP both..
the computer has a number in its brain it wants to achieve, and it uses the IPR to try and reach it. If desired and actual don’t track fairly closely then the engine ends up under or over fueled and can cause smoke.. usually will set a code
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Old 04-20-2019, 10:12 AM   #44
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No that's too much for the gauge however I personally use a mechanical gauge to check the accuracy of the sensor
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Old 04-20-2019, 11:07 AM   #45
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No that's too much for the gauge however I personally use a mechanical gauge to check the accuracy of the sensor

HPOP pressure goes upwards of 3000 PSI at times... I havent found a mechanical gauge and line that I trust at those pressures
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Old 04-20-2019, 05:30 PM   #46
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466 is NOT a 7.3A couple of things. Low oil pressure - weak battery or air leak into the fuel lines -
A shot (slight shot). Milliseconds of a squirt of Diesel engine starting fluid. If that fires then your high pressure oil pump is no goodo.
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Old 04-21-2019, 11:56 AM   #47
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HPOP pressure goes upwards of 3000 PSI at times... I havent found a mechanical gauge and line that I trust at those pressures
Not at full pressure but a 1000psi gauge will work for checking cranking pressures against the sensor
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Old 04-21-2019, 01:26 PM   #48
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Not at full pressure but a 1000psi gauge will work for checking cranking pressures against the sensor

true that... they usually only run up to 500 - 700 at idle also..





dirt-doctor, the 466E's without the grid heater you can try starting fluid on.. with a grid heater you should unplug it first (yeah it will likely set a code).. otherwise you can light off the starter fluid in the intake pipe.. which doesnt help much with starting..
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Old 04-21-2019, 01:46 PM   #49
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I have a 10,000 psi oil filled pressure guage that I use for troubleshooting and re-building hi pressure power washing pumps.
I have pegged it before but haven't blown it yet? Usually at those pressures you find the weak parts fairly quick.
Fuel or anything at high pressure is a must wear your correct PPE.
Personal protective equipment.
Diesel fuel injection for your body probably ain't the same as Botox are whatever that stupid mess is.
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Old 04-21-2019, 02:02 PM   #50
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I have a 10,000 psi oil filled pressure guage that I use for troubleshooting and re-building hi pressure power washing pumps.
I have pegged it before but haven't blown it yet? Usually at those pressures you find the weak parts fairly quick.
Fuel or anything at high pressure is a must wear your correct PPE.
Personal protective equipment.
Diesel fuel injection for your body probably ain't the same as Botox are whatever that stupid mess is.

in the case of these engines, its motor oil that gets super pressurized.. but yeah im guessing a stream of that at 3000 PSI would still poike some nice holes in you
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Old 04-21-2019, 02:09 PM   #51
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Either way?
I have absorbed plenty of both through my skin and tasted it plenty of times but anything at that pressure is a definite injection that probably won't be accepted in the body to well?
Everyone be safe
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Old 04-21-2019, 02:18 PM   #52
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Started again.

Smoking bigtime
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Originally Posted by cadillackid View Post
in the case of these engines, its motor oil that gets super pressurized.. but yeah im guessing a stream of that at 3000 PSI would still poike some nice holes in you
I've done a lot of pressure washing with 3000 - 5000 lbs, and sprayed paint with airless sprayers at 3000 lbs, and you don't want fluid from either hitting your skin at close range - water can do a lot of damage and paint forced under your skin can be deadly - I imagine having oil forced under your skin is potentially deadly too
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Old 04-21-2019, 02:45 PM   #53
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No start

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Started and ran a little bit two weeks ago but doesnt want to start today. Have tried several times. A couple it seems to be almost running like 6 or 8 revs then dies. Thoughts?
The dt466e has a crank sincer that controls the injectors it is located on the front of the motor and just under the water pump on the right side of the motor it has 1 10mm bolt holding a clip over a plastic plug with 2 wires this was a common problem with the ones we had at the school bus would run then when you went to stop it would die and not restart it works on a magnet so when you take it out see if it rattles freely when you shake it no rattle no work hope this helps
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Old 04-21-2019, 02:50 PM   #54
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The dt466e has a crank sincer that controls the injectors it is located on the front of the motor and just under the water pump on the right side of the motor it has 1 10mm bolt holding a clip over a plastic plug with 2 wires this was a common problem with the ones we had at the school bus would run then when you went to stop it would die and not restart it works on a magnet so when you take it out see if it rattles freely when you shake it no rattle no work hope this helps
Pretty easy to check by looking at your rpms as well
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Old 04-21-2019, 11:21 PM   #55
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Wow thanks so much for the information here. It may take me just a bit to absorb it.
Not sure on the oil smelling like diesel, or it it is making oil. It was a little over the full line which i thought was odd, but don't remember the level when i purchased it.

One thing I did do in the short time I ran it to get the pic was to try to put a thermal gun on the exhaust where it comes out of the motor.. (never did let it warm up). but the front 3 were all from 75 to 90 degrees and the rear three seemed over 100, up to 145 i believe. not sure if that helps anything either.
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Old 04-21-2019, 11:26 PM   #56
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https://youtu.be/py4yajNp-YY

Quick video of the exhaust that day
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Old 04-21-2019, 11:29 PM   #57
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It will read icp but it needs to be programmed


hi Doe, do you know how to add the icp pressure to my gauge?
It seems like a saw a video somewhere on how to add the icp voltage, would have to look it back up, but didn't see the pressure
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Old 04-21-2019, 11:30 PM   #58
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oh also, When i pulled the oil dipstick out while it was running, there was a little smoke coming out of that tube.
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Old 04-22-2019, 06:23 AM   #59
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Originally Posted by Jolly Roger bus 223 View Post
I have a 10,000 psi oil filled pressure guage that I use for troubleshooting and re-building hi pressure power washing pumps.
I have pegged it before but haven't blown it yet? Usually at those pressures you find the weak parts fairly quick.
Fuel or anything at high pressure is a must wear your correct PPE.
Personal protective equipment.
Diesel fuel injection for your body probably ain't the same as Botox are whatever that stupid mess is.
Yeah, cause injecting one's self with botulism is SEXY lol.
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Old 04-22-2019, 07:05 AM   #60
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Yeah, cause injecting one's self with botulism is SEXY lol.
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