Its the exact opposite really. The engine is being choked by the EGR during initial throttle off idle and it actually pours out the soot, you just can't see it. After the EGR starts to close and boost comes up, then you get the increased power. Thats where even with stock components, disabling the EGR "feels" like more power.

If Cbrahs says it, its not just a off the cuff statement from what I know. It may not be a hard and fast mileage rule, but the ECM is fully adaptive going through its DTC routines to compensate for differences in components on the engine. That is one of the notes from the Smarty software as well as the ECM is continually going through various routines. One person to confirm with may be Hohn.

 

You said you could feel it? I never felt any dif on mine either.

 

Yes but on the first 500 miles of towing a new truck your not to exceed 50 miles per hour,that's acording to the owner's manual.

 

yes, we were in salt lake area, just got off the freeway for fuel, got back on and up to speed and it actually felt like we got a nudge from behind. my buddy felt it too and ever since it has run good. I have feelers out to get proof so it may take a bit. reps are slow and get to things when they want to.

HOHN confirm or deny please. I am only going by what 2 district reps told me (one from here in NM and 1 from Idaho where i bought the truck).

 

I went and test drove another truck today, this time it had the HO Cummins 800.

HUGE difference! Either the first truck had something wrong with it, or the extra 150 lbs of torque makes that big a difference. The truck I drove today had pep, zip, and I would have been happy driving it home. Wow, is all I can say. Wow.

 

I had just 300 miles on my 10' when I hooked to my first load. Went from McKinney to Killeen running between 75-85mph! Was hauling my 98 12v. And a few weeks later hooked it up to the sled in Alvarado. Gets great mileage and pulls like a tank.

 

My '09 was a bit of a slug when it was new...by the time it hit 15,000 miles it ran smooth and was a lot more awake than the day I took it home.

 

The comment about 15k mile service caught my eye. Is there a diff oil change scheduled for that one?

I'm at 8400 right now and have made a couple trips with the camper draging behind - the truck has run better after each trip.

I can't wait for our winter trip 10,000 miles all towing.

 

For mostly towing the first diff fluid change is at 15,000 miles. It will be gray and look ucky due to the gray sealer they put on the gears to prevent rusting while they wait to go in a truck. That's what the 500 mile wait before towing is all about. Gives it time to seat the ring and pinion in and wear off that sealer. I would do the first one at 15,000 and then every 30,000 there after.