June Flash

[snoman]

Apparently, there is a flash coming in early June that is supposed to increase fuel milage by 3-4 mpg. The reason milage is so poor on these has something to do with the EGR recycle and regen. The way he explained it made it sound like the EGR system essentially shuts off the turbo and intercooler. Which is compounded by the regen cycle.

He stated that a couple mechanics in the shop had 6.7's and one got 9mpg consitantly and the other got 18mpg ... what a difference

I found this info out when I had another dealer look at my truck for poor fuel economy. They put it on the ScanStar and found an update fo the OHC and ECM. Drivability was the reason for the update. It's fixing issues with tranny shifting, regen, fuel economy and a few others that I can't remember.

Anyway, have a great day

[cruelgto1968]

Sounds good to me, I'll keep my eyes open for this.

[whid1]

Snoman,
For what years is this new flash coming in june---------------just 07--08 or earlier within the 3rd generation?

[cruelgto1968]

Probably the 6.7L, since that is what forum you are on I think they have had enough time to fix any problems with your truck.

[cruelgto1968]

Why don't they come out with a flash that gets everybody on the same playing field. Some truck are getting 9 mpg and some are getting 18 mpg, it would be a good start to get them all getting 18.

[Dieselgoose]

They are not getting 18 hand calc'ed on a stock truck. No way no how with the regen and egr stuff. That would be a overhead reading unless its a modded truck or they are resetting the mpg on the OHC while they are going down the highway.

It sounds like its just for the auto's. Any idea if its for the standards as well?

[cruelgto1968]

I've read many threads with people claiming 18-19 mpg hand calculated on a stock truck. Look at "what's your best MPG" thread in this section.

[7492]

Originally Posted by Dieselgoose

They are not getting 18 hand calc'ed on a stock truck. No way no how with the regen and egr stuff. That would be a overhead reading unless its a modded truck or they are resetting the mpg on the OHC while they are going down the highway.

It sounds like its just for the auto's. Any idea if its for the standards as well?

I'm going to disagree with you .. I can show you 19.3 MPG highway. Hand calcuated as you would say....I divided it on paper with a pencil. Round trip across the Pa. turnpike 550 miles . 28.4 gallons filled to the neck after trip. Speed is the key or should I say lack of speed. 65 MPH on cruise @ 1525RPM's ...

[FiFo]

Originally Posted by Dieselgoose

They are not getting 18 hand calc'ed on a stock truck. No way no how with the regen and egr stuff.

I've gotten as high as 19.5 mpg hand calculated, but that was 100% highway and empty. I rottenly get between 18-19 mpg hand calculated highway when empty, but it drops to 14-15 mpg hand calculated when I do a lot of city driving.

[7492]

Originally Posted by FiFo

I've gotten as high as 19.5 mpg hand calculated, but that was 100% highway and empty. I rottenly get between 18-19 mpg hand calculated highway when empty, but it drops to 14-15 mpg hand calculated when I do a lot of city driving.

Well what kind of mileage should a 7500 lb truck get in the city. I think 14 to 15 is great.

[drtnsnw]

Originally Posted by 7492

Well what kind of mileage should a 7500 lb truck get in the city. I think 14 to 15 is great.

Problem is mine get 12!! I would love to see 15!! Heck I would love 15 on the highway!!

Pre DPF trucks would see hi teens low 20's easy and my old 99 would get 18 city with me driving it like an idiot!!
If I can;t get better economy this will be my last truck course, that is what the greenies want
Chris

[Dale_K]

I hope the new flash is genuine but I'm skeptical. BTW, I have hand calculated at least 10 tanks and always get over 18mpg. I drive it like a little old lady.