Engine/Transmission (1998.5 - 2002) Stock ETH smoke visible at night

[rspinks]

I noticed last night that under full throttle and high RPM's I can see some visible exhaust particulate in 2nd and 3rd gear. I can only see it at night looking in the mirror with a vehicle behind me such that his headlights are illuminating the particulate matter hanging in the air. I can't say if it's white/blue/black or what. It isn't visible in 4th or higher, I imagine because the increased windspeed dissipates it quicker. I've never noticed any smoke in daylight.



Has anyone else noticed this? I didn't think stock trucks were supposed to smoke at all. Maybe Cummins put 275's in my engine by accident, that would also explain why I got 248HP on the dyno on 2 separate runs. Or maybe my VP44 has problems and is overfueling the truck . Or maybe it's oil blowby and I have a ring seal problem or worse . Or maybe I should just keep my eyes on the road ahead under full throttle and not worry about it .

 

[dalexander]

rspinks,

That is quite common, I have the same smoke visible with my Stock ETH at night, In fact I see that on my gassers at full throttle at night also.

 

[Diesel Freak]

it is normal, you have nothing to worry about.



put some showerheads in that thing..... you can almost make the headlights dissapear

 

[MJawsman]

Same thing with mine... . above 2700 RPM I can see smoke during the day!

 

[Whitmore]

me too

I can see alota black smoke bellowing outa my stacks in all gears

 

[rspinks]

Well that's good news, I wasn't too concerned about it. I wonder why it only happens at high RPM's? Do they program the fuel curve this way to make it richer, or are you reaching the limits of the intake air / turbo efficiency?



Whitmore I believe you are stretching the definition of stock somewhat .

 

[tarussell]

I notice smoke from my ETH at night also. Seems to happen if I shift early in third , fourth, and fith gears and get into the pedal more than usual. Glad to hear that other ETH's are doing the same.

 

[SOOT]

I see smoke out of my stacks in all gears

Day or night