I have about 675 miles on truck now and just decided to give it a few WOT bursts to redline from 2nd to 5th gear. At about 2400 RPM to about 2700 RPM there was a lot of hesitation. I just stayed with it and happened to look back and saw quite a bit of blue or black smoke. Hard to tell since it is raining and foggy out. When it smoothed out the smoke disapeared.


It did this in 2nd, 3rd gears mostly. My truck was built on about 3/16. Anybody else experiencing this or can someone please tell me what may be causing this.

Thanks
John

 

I should add that my mpg arent bad for a new truck. I'm averging 16.4 on the overhead with mixed driving.

 

John, it was probably caused by the WOT bursts to the redline that your BRAND NEW truck did in 2nd thru 5th gears ........

I don't think a build date of Tuesday March 16th has anything to do with it.

Mine seems to appear to smoke in wet/foggy weather. I wouldn't even give it another thought. Especially since you're happy with the fuel mileage.

 

There is a TSB for hesistation/stumbling which some of the early 2004.5s were affected by.

Vaughn

 

Do you think that I'm a little premature in openening her up already. The first 500 miles were very tame but I figured I'd help the break in a little with some aggresive driving.

I am aware of the TSB but my truck dosent fall into the build date/vin number window for that problem. It dosent appear to do it all the time.

I just loaded the bed up with probably 600 pounds of firewood to drive around for a week. I read an email from cummins reccomending that for the break in.

 

Nah, I was just messin' around. I remember doing the same kind of thing. I'm driving it this week the same way I drove it home brand new.

 

John...I agree I wouldn't worry about it at all. Keep driving it and let it break in. Also your mileage is really good. I've got roughly 360 on mine and only getting 12 at best. Got any firewood you can lend me? lol

 

Odd, I noticed some smoke from my '04.5 today too. I had about 650 miles on it when I got on it going up an onramp to the freeway... I wasn't running WOT to redline, probably only about 3/4 throttle, but accelerating pretty hard. This is the first smoke I have seen from my truck... weather was clear, 50 deg, 25% humidity, typical AZ morning air. Anyhoo, consider yourself lucky to be getting 16.4, I am still stuck in the 12's!!

 

I think some quick WOT blasts like JohnnyH did after 500 miles was a good thing to do, better than featherfooting it for the first 1000 miles IMO I ran mine WOT around 500 miles.

Vaughn

 

I have about 650 miles on mine, and while most of my driving during the week is commuting, and I rarely am able to get it above 4o, due to traffic, I am trying to "get on it" a bit, to start to work the engine, and not let the tranny learn "lazy" either. Haven't been able to get any smoke.

So far, truck has exceeded my expectations. Mileage - yeah, in the 12s, on the same commute that my PSD got 15s. But, this is an automatic, and a dually, where my PSD was a SRW and 6 speed.

I'll tell you my V10 would have been lucky to break into the 9s on a truck this big and heavy.

I figured it out - based on current diesel prices, I am averaging about $13/month MORE for commuting miles than I did with PSD. Heck, that's LESS than the price of a pizza. I can live with that!

 

$13 for a pizza is a lot. I can get one for $11.

I had 350 miles on my engine when I opened her up. Did many 0-115 runs on her. That was 57k+ miles ago. Doesn't burn a drop of oil and she'll still get up and run like a violated ape. Pulls about 16 mpg highway/city.