Blue smoke.... Need help!!!!

early99powerstroke · Jun 12, 2011

Hi i have a early 99 7.3 powerstroke with 170,000 miles. I've noticed only on heavy acceleration my truck blows blue smoke. The higher the setting on my dp-tuner the more blue smoke it produces. I checked my oil level and it doesn't seem to be going down. I did the oil cap test(putting the oil cap upside down on the oil spout and to see if blow-by will blow the cap off) and it passed. I checked for seepage of oil in the intake tube where the ccv meets the intake tube and there is none. I do have a bad #8 injector which makes a loud knocking noise after the motor warms up. Any thoughts or ideas what could be causing the blue smoke? All thoughts and ideas are welcomed!!!! Need Help

Early99strokin · Jun 12, 2011

Could be the intercooler has a good bit of oil in it. It ill fill up in the bottom of it over time.

TrailerHauler · Jun 13, 2011

Could be your bad injector, or injector o rings.

Sequential6.4L · Jun 13, 2011

Welcome to the army bob.

thuglike · Jun 13, 2011

TrailerHauler said:
Could be your bad injector, or injector o rings.

bet the house on it!!!!!

HaysKSFirefighter · Jun 14, 2011

TrailerHauler said:
Could be your bad injector, or injector o rings.

:whs:

Whytry · Jun 16, 2011

TrailerHauler said:
Could be your bad injector, or injector o rings.

That is my guess

Big Bore · Jun 16, 2011

Replace injector and all injector o-rings, you will think the truck is new again.

early99powerstroke · Jun 19, 2011

I really hope its that stupid injector or the O-rings. If my cylinder walls or my compression rings are messed up I'm gonna be pissed off. My truck recently underwent a contribution test and passed, does this support the blue smoke issue being due to an injector or injector 0-rings? How accurate are the contribution tests?

TrailerHauler · Jun 19, 2011

Contribution test will tell you whether or not all 8 cylinders are firing.

jdgleason · Jun 19, 2011

If your truck isnt eating much oil at all I would be willing to bet its o rings/ cup

early99powerstroke · Jun 19, 2011

Thats the weird thing. Theres a little blue smoke under heavy fueling and acceleration, but I check my oil level and it hasn't gone down at all and if it has gone down then its not noticeable.

SouthFlstrokin' · Jul 6, 2011

What if the truck is eating oil? I have a little smoke come out of the oil fill tube, the oil cap vibrates off from the vibration but doesn't blow off or anything. Sometimes I have to add a quart of oil if I drove it somewhat hard for that couple thousand miles. Exhaust Smoke, I guess has a bluish tint to it if I roll into the throttle and its in overdrive. Not sure if I should be worried or not sorry for the rant/derail...