New motor. Running rough

[Lmgrpowerstroke]

Initial start up of the new motor. Ran good was getting air out of the lines. Complete LP fuel system is new.
Started idling strange and spitting white smoke.
Shut it down checked some things started back up idles good.
Put it in gear to back out Revs to 2k and drops to normal and starts smoking again. Put it in park does it again.

Thoughts on what could be going on

 

[HOOV3R]

Codes?

 

[Lmgrpowerstroke]

No codes except for the ones of things not hooked Truck has a single turbo. Fuel cooler is deleted.

 

[drunk on diesel]

do you have an IDS or similar where you can watch power balance and kill injectors?

sounds like injector(s) to me

 

[Lmgrpowerstroke]

No I do not Not to familiar with that
It runs fine when I shut the truck down and restart

 

[Dzchey21]

did you install new injectors or anything like that?

What its doing is seeng a power balance problem and adding fuel untill finally it will shut that one cylinder off. IF you let it run long enough you will get a misfire code. So i would let it run a little longer and see if you can find out whats going on. But it sounds to me like you might have a bad injector or a nozzle

 

[Lmgrpowerstroke]

They are the injectors that were on the truck prior to the rebuild. Motor was rebuilt due to HG. Stock injectors

 

[Dzchey21]

was the truck down for awhile? I have seen the injectors for whatever reason take a dump if the motor sits torn apart for a couple weeks. Pintles get stuck, must have a little moisture in them or something. I have actually heard of 2 full sents not even work at all after a rebuild like that.

Are you also sure that all the glow plugs are in tight? A slight cylinder leak could cause a similar issue but i would think you would have many more problems.

 

[Lmgrpowerstroke]

All the glow plugs were torqued in to spec. Motor was apart for about 8 weeks. Injectors were out and wrapped up in a climate controlled area.

 

[Dzchey21]

well unfortunatly your going to have to narrow down what cylinder it is for sure. Either a power balance test with IDS or auto enginuities or let it get bad enough to throw a code. But the next step once you find that will be to swap in a new injector. Or swap from one cylinder to the other and see if it follows the injector. There is always a possiblility that you have low compression on the one cylinder from say a bad valve job or a pushtube not seated correctly ect.

 

[Lmgrpowerstroke]

I will let it run for a bit tomorrow and see if it throws a code. If it had low comp in a cylinder wouldn't it do it from the start

 

[Dzchey21]

you would think you would hear something for sure. If the leak isnt terrible it wont do it right away.

 

[Lmgrpowerstroke]

Worst case guess I will have to take it to the dealership

 

[02bigstrokin]

Were the heads decked? Valve job done?

 

[Lmgrpowerstroke]

New heads from midwest diesel

 

[02bigstrokin]

Did you replace the high pressure pump?

 

[Lmgrpowerstroke]

No still the stock one. Wasn't weak

 

[02bigstrokin]

My guess is a valve sticking in hpfp. Start truck and hook up your tuner or whatever you have that will clear codes and hit clear codes. See if it starts idling normal even if it doesn't show any codes.

 

[Dzchey21]

My guess is a plunger sticking in hpfp. Start truck and hook up your tuner or whatever you have that will clear codes and hit clear codes. See if it starts idling normal even if it doesn't show any codes.

why would that do anything? All that would do is make for low rail pressure hard starting ect. Obviously it will take the injectors out if the metal gets in the system but even down 1 plunger you would never know untill a WOT run logging PW and pressure. The injectors are what controls that fuel in the cylinders.

 

[02bigstrokin]

Personal experience... But Nevermind I'm not arguing. Was just trying to help dude out. Carry on