running rough with white smoke

[john65td]

i was drivng my truck today and when i came to a stop i noticed my truck was puking white smoke. its unburnt fuel i can smell it. also its running real rough shaking the truck. it starts fine just the miss and smoke. this leads me to believe one of my injectors died. am i heading in the rigth direction or is it the pump. the truck is all stock with 166k miles

 

[WarWagon]

The injectors are past the 100K rated life. Even the worst injector will start to fire at some point. Melting a piston when it does fire or scoring the walls from raw diesel is possible. Bad injectors can miss cold. The pump supplies all 8 so it works or doesn't on ALL 8.

Likely you have other issues causing the miss. Pop the oil fill cap and look for a chug of smoke. Then suspect the rocker arm buttons for breaking and dropping a cylinder out from a closed valve. Maybe even a burnt valve.

 

[john65td]

i don't think its a dead miss like bad cylinder. with the unburnt fuel smoke it lead me to injectors or pump

 

[tanman_2006]

Sounds like an injector stuck open to me...

 

[john65td]

that would create a loud knock wouldn't it? there is no abnormal noises just the rough running and smoke. if i reev it up to 2,000rpm it smooths out but still white smoke. head gaskets are good no coolant use or extra pressure

 

[Twisted Steel Performance]

Have you cracked each injector line open while at a idle yet to see if you can locate the cylinder that is missing ????

Crack one at a time and see if the motor reacts one by one....

 

[john65td]

im at work right now but i will and see what happens

 

[john65td]

no change on 6 and 8 when i crack the lines so its teardown time

 

[john65td]

war wagon is right dam plastic rocker arm retainers

 

[vstech]

plastic rocker buttons...
classic symptoms.

 

[matuva]

or broken valve

 

[Twisted Steel Performance]

If you could find a set of the old style rocker arms you would be better of with them, no buttons.....

 

[john65td]

i know, when i replaced my friends motor we used the old style arms, i haven't come across another set. well all 16 buttons are replaced and i also pulled and tested injectors, there not original so milage is unknown but all were 2000psi to 2200psi so i feel comfortable with that. now if i could just find a good turbo, mine is leaking just a bit

 

[vstech]

last issue of Diesel Power mag had an add for roller rockers on a shaft... no idea what they cost though...

 

[Twisted Steel Performance]

last issue of Diesel Power mag had an add for roller rockers on a shaft... no idea what they cost though...

700$ + I think....