im working in a 05 dt466e that blows tons of white smoke and misses at higher rpms, i replaced fuel lift pump due to low fuel pressure, had injectors benched tested and replaced 5 out of the 6, replaced cam sensor and finally puled the head and had it gone through and it still smokes and misses at higher rpm any help would be greatly appreciated.
Is your ICP valve responsive?
Yes
What happens if you on plug your ICP with the engine running
Still misses at higher rpm and smokes white raw fuel smike
Did you check the strainer screen back above the starter right in line with the water separator It's a small bowl plastic about 2" tall maybe 3/4 of an inch to an inch wide
Yes cleaned, new filter, new relief/regulator in filter housing and new lift pump
On top of your secondary fuel filter there should be an 1/8 inch pipe plug remove the plug , screw a gauge their you should see 40 to 45 pounds full throttle if not you probably have an obstruction or air intrusion
Had 40-45 and was told that was low and replaced lift pump and relief now have a pretty constant 60 psi
Do you have the means to monitor your injection control pressure while driving it or running the engine
Take your fuel return line and run it out into a bucket observe it under throttle and under load if it's aerated you probably have combustion gas leaking past a cup up into your injector fuel supply. Did the guy who did your shoulder head replace all the injector cups
650 at idle 1700 at 1500 rpm 2300 at 2000rpm
Cups where done when head was sent in
Those pressures seem very low, we should be around 2k just to start iirc. I got as book around here somewhere. I'll look for it this weekend.
Thank you really appreciate it, I did find this page and it also doesn't throw any codes for ipr low voltage or out of range
Sorry, kept you waiting for nothing. I thought the ICP was supposed to go full pressure when unplugged, unfortunately, it fails to minimum. Back to basics, check fuel pressure and supply. Run off alternate fuel source to rule out garbage in your tank. Run return fuel into a bucket. Check for aeration. Lots of bubbles indicates combustion gases leaking into fuel galley. BTW, what's the condition of the engine oil? Is it a quality oil, has it been fuel diluted, when was it last serviced? Do you have boost pressure, is the waste gate damaged or stuck. Do you have a cracked cooler or blown boost hose? Boost relates to load, which correlates to ICP. Low boost, low ICP. After your head was repaired, did you really beat the **** out of it? The heui engine is kinda like the old Detroit's. They wanna be loaded hard and driven hard. That's the only way to purge the high pressure oil galley of air. 25 miles of abusive driving. If you got a dyno , all the better, 60-70%load 2-3 minutes at a time will get it done quick . Best I can do for you. Let's see what you find with what I've suggested
Thank you, will try all of the above you stated on monday
So, how did things shake out
Did some more testing and had a couple other techs take a look and they where baffled so I've exhausted my resources and it going in to the international dealear next week will keep you updated on what they find, thanks for all your help