Well pulled the 5th wheel for a 4th of July weekend and as usual my $52k POS gets 8.3 mpg driving at 65-70mph. Well on the return trip I decided to go 58mph (gasp) it was getting 12.8 ran about 40 miles and thought I wonder what happens at exactly 55mph?? Reset dic on th road and it was in the friggin toilet in the 9's never came back up?? What gives??? I had the Quad stealth on econ prog, have no DPF , no cat 07 MBRP down back. It's like it was doing the regen with out the crap on there. Is it possible that it will do a regen after so many miles regardless of what the quad is telling it??

I've had some guys claim the quad programming is dirty and not really clean like EFI. I'm looking for mileage when towing and not towing both I have seen 17.8 on the road not towing at 65mph. truck has 6500 miles on it. As I had posted before this truck has really pissed me off since day one my 07 F350 got great mileage compared to this thing with a smaller engine and less power. I got 10.2 at 70-75 in the mountains going to Lowes Motorspeedway. I want to know the honest truth about MPG what your towing, If it's not a 4wd 4 door dually It's really not to compare with me. Help me out here cause this is really got me ticked.

Do you still have the DPF fuel injector installed?

truck has 6500 miles on it.
As I had posted before this truck has really pissed me off since day one
my 07 F350 got great mileage compared to this thing with a smaller engine
Help me out here cause this is really got me ticked.

YOUR BAD~! ... shoulda' bought a Ferd!

Do you still have the DPF fuel injector installed?
What???

Well pulled the 5th wheel for a 4th of July weekend and as usual my $52k POS gets 8.3 mpg driving at 65-70mph. Well on the return trip I decided to go 58mph (gasp) it was getting 12.8 ran about 40 miles and thought I wonder what happens at exactly 55mph?? Reset dic on th road and it was in the friggin toilet in the 9's never came back up?? What gives??? I had the Quad stealth on econ prog, have no DPF , no cat 07 MBRP down back. It's like it was doing the regen with out the crap on there. Is it possible that it will do a regen after so many miles regardless of what the quad is telling it??

I've had some guys claim the quad programming is dirty and not really clean like EFI. I'm looking for mileage when towing and not towing both I have seen 17.8 on the road not towing at 65mph. truck has 6500 miles on it. As I had posted before this truck has really pissed me off since day one my 07 F350 got great mileage compared to this thing with a smaller engine and less power. I got 10.2 at 70-75 in the mountains going to Lowes Motorspeedway. I want to know the honest truth about MPG what your towing, If it's not a 4wd 4 door dually It's really not to compare with me. Help me out here cause this is really got me ticked.

if the F-350 is so much better why did u get rid of it?

What size and weight is your fifth wheel trailer?

Are you sure your quad is updated and working right? Doesn't sound like it.

Of course I don't have a dually, but do have the 4wd, crew cab. It gets 22mpg on the highway, no load or head winds at 62mph.

Pulling at 6k I've gotten 15mpg, dic and hand calculated, again at 60mph. Mileage goes down to near 10 to 12mpg pulling over 12k or so at same speed. That's with an all stock truck, dpf and all.

Maybe you have a bum tuner, do a search here, there have been plenty of quad failures and snafus. Just my two cents.

midgetracer59, maybe an obvious question, but just to make sure: Did you download the NO DPF software from the Quadzilla web site and install it on your tuner with a USB cable? The standard software that comes with the Stealth 2 is for a truck with a DPF installed.

I don't have a Dually, but, I've found that at 55mph, my truck will stay in 5th gear pulling about 1600rpm's when in TH mode with my 14K lbs 5ver, DIC showing about 9mpg. When going 58-65mph, it shifts to 6th gear and holds at 1400rpm, DIC shows usually 10-10.5mpg. I understand your ticked, but one thing that seems to always be overlooked, is that with the power these beasts make, it comes with usually more fuel added into the equation. This makes it impossible to get great mpg's. If you look at all the forums for the various Duramax's, from the LB7 to the LMM, the mpg's go down generally with each variation. Same basic design since the beginning, but much more power in a stock LMM compared to an LB7, fuel tuning being a big part of that as well as a few internal tweeks/turbo changes here and there. Plus, at 6800 miles your truck is practically brand new. Give it some more time to get worked and it should get better. It could be worse, brother in law's 6.7 MC 4x4 Dodge gets 11mpg empty and 7.5mpg towing his 14K 5ver, with an oil leak around the oil filter area that the techs can't find. One last thing to consider is the driving conditions, a strong headwind/crosswind will drop mpg's by 1-2 easily. Chris

I agree with D/AChris, you need to let the truck get a few, miles on it before judging it. You also have to realize the front of your 5'er has a very profound effect on mileage. The shape and height can vary from camper to camper. More height equals more resistance. Trust me my 5'er is one of the taller ones. I made a trip to SC not long ago with the camper in tow, my mileage was a steady 9.0 all the way down and a steady 9.5 on the way back. That's with the cruise set at 70.mph,T/H on, DPF on, bone stock.

I haven't towed any real distance with the DPF off. I have a trip planned in August to Ohio so we'll see what kind of mileage I can get without it. With my '05 LLY I would get close to 7.7 mpg towing, 13.5 without. I am not known for babying the truck.... So far the LMM has gotten better mileage towing and not.

midgetracer59, maybe an obvious question, but just to make sure: Did you download the NO DPF software from the Quadzilla web site and install it on your tuner with a USB cable? The standard software that comes with the Stealth 2 is for a truck with a DPF installed.

I'm with this guy,,,

Ok thanks for all the replys!! Including the smart A$$ ones..... The Quad was programmed with the correct download from their website. It does not have the latest one that I see has failed in the stock tune / DPF delete, so I should be OK on programming being current.

The 5'er is a 38.5ft Montana thats like 12-9 tall max gross is 15,500lbs, This is the same unit I pulled with the 07 F350 at 10.2 avg at 70-75 mph.

What type of failures have been going on with the Quad???

Also I have pulled with the 50 & 75 hp tunes, no real mileage advantage was had with either. I think with a trailer this big and heavy that you can slip the trans pretty easy even at those added power levels if you really crowd the throttle.

Once I'm rolling pretty good on the high way I turn off the tow haul to get it in high gear and to stay away from the 2k plus revs. Mistake or not???

No one addressed the EFI vs Quad for quality of programming?? Opinions???

Guy's don't take me too much the wrong way here I like the trucks interior and creature comforts way better than my last two Ford's. It's just my GM guru buddy who talked crap so much about the power of a Dmax and how good his mileage was prompted me to trade a 8 month old truck for this one. On the drive home from Indy after picking it up we got 13mpg highway at 65mph , and I thought to myself this is not good. so I did the exhaust and the tuner and it's still not stellar to say the least. I know the fuel is S&*t too I'd love to have a tank of the old fuel just to see how it would run .

Anyway give me all the input you can, my wife would kill me if I was to trade again.......:eek::eek::eek:

Ok thanks for all the replys!! Including the smart A$$ ones..... The Quad was programmed with the correct download from their website. It does not have the latest one that I see has failed in the stock tune / DPF delete, so I should be OK on programming being current.

The 5'er is a 38.5ft Montana thats like 12-9 tall max gross is 15,500lbs, This is the same unit I pulled with the 07 F350 at 10.2 avg at 70-75 mph.

What type of failures have been going on with the Quad???

Also I have pulled with the 50 & 75 hp tunes, no real mileage advantage was had with either. I think with a trailer this big and heavy that you can slip the trans pretty easy even at those added power levels if you really crowd the throttle.

Once I'm rolling pretty good on the high way I turn off the tow haul to get it in high gear and to stay away from the 2k plus revs. Mistake or not???

No one addressed the EFI vs Quad for quality of programming?? Opinions???

Guy's don't take me too much the wrong way here I like the trucks interior and creature comforts way better than my last two Ford's. It's just my GM guru buddy who talked crap so much about the power of a Dmax and how good his mileage was prompted me to trade a 8 month old truck for this one. On the drive home from Indy after picking it up we got 13mpg highway at 65mph , and I thought to myself this is not good. so I did the exhaust and the tuner and it's still not stellar to say the least. I know the fuel is S&*t too I'd love to have a tank of the old fuel just to see how it would run .

Anyway give me all the input you can, my wife would kill me if I was to trade again.......:eek::eek::eek:

That's a pretty big trailer, dang. Your Allison has a fast learn and a slow learn process that helps it deliver max torque without puking itself through slippage, at 5% it will defuel to preserve itself. So it learns your driving style and adjusts accordingly in conjunction with torque input and what your load is. It's keeping itself out of 6th gear for your load and speed on purpose when you were towing.

I have read here several post regarding the quad not locking up the torque convertor when towing below a certain speed. Here is one such post. If you do a search here you can find all kinds of weird problems, defueling etc...I'm not knocking quad, just the facts.

http://www.dieselplace.com/forum/showthread.php?t=237787&highlight=quadzilla+problems

EFI compared to Quad, there is no comparison, EFI is it, but quad is much cheaper. Look up duramaximtuner.com and look through Nick's information and his tunes. EFI's tuning ability is as good as it gets, write your own tune or have an expert write you a tune or tunes, it is limitless.

As far as your mileage goes, that engine is far from being broken in, usually around 10k or so, IMO. I would agree with some here that wind and time of the year does play a part in your mileage with that big a load.

Most, not all would agree, not to run that 70hp tune while towing the load you are, or you may limp your tranny on top of the poor mileage.

Hang in there, these are good trucks, hopefully you get to the bottom of this, most guys here are willing to help you out, just watch out bragging on the ferd stuff, you won't get much help doing that. There are some good gm diesel mechanics here that watch the threads. Be patient for some solid answers.

Mike

Well pulled the 5th wheel for a 4th of July weekend and as usual my $52k POS gets 8.3 mpg driving at 65-70mph. Well on the return trip I decided to go 58mph (gasp) it was getting 12.8 ran about 40 miles and thought I wonder what happens at exactly 55mph??

Hmmm ... 12.8 MPG with 15k billboard in tow ... what's the beef. Was that 40 miles downhill in a tailwind?

Reset dic on th road and it was in the friggin toilet in the 9's never came back up?? What gives???

Read through this forum, I don't think 10 MPG is off the mark for a 15k load.

I had the Quad stealth on econ prog, have no DPF , no cat 07 MBRP down back. It's like it was doing the regen with out the crap on there. Is it possible that it will do a regen after so many miles regardless of what the quad is telling it?? I've had some guys claim the quad programming is dirty and not really clean like EFI.

Quad's off-road program prevents REGEN. I can guarantee that Quad's +50 and +70 generate much less soot than Edge's programs. As far as EFI, that's strictly dependent on the guy who designs your tune. There's no guarantee it would be "cleaner." In fact, I find the +50 seems cleaner-burning than factory stock ... for the speed of accumulating soot.

You need a dashboard monitor for running these tuners, even just for towing heavy. Do you have an Insight or DashHawk?

I'm looking for mileage when towing and not towing both I have seen 17.8 on the road not towing at 65mph. truck has 6500 miles on it.

That's only Okay mileage for a NO-DPF at a nice, clean 65 MPH.
Mine can get that all day long, WITH DPF. Not sure what's going on there.

... same unit I pulled with the 07 F350 at 10.2 avg at 70-75 mph.
. . . What type of failures have been going on with the Quad???
. . . Once I'm rolling pretty good on the high way I turn off the tow haul to get it in high gear
and to stay away from the 2k plus revs. Mistake or not???
. . . No one addressed the EFI vs Quad for quality of programming??Opinions???
The Quad didn't cause the TC problems in that other thread, the load did. The Trans TCM (computer) is reacting to its programmed tables ... which are not modified by the Quad. The only Quad failures I've seen relate to a fluky keyboard or refusal to load the program ... generally due to "operator error."

I upgraded my trans with TransGo Jr before adding the Quad ... you should have too. Considering your load, I would reset Quad to stock when towing. I haven't seen any reports that the ECON setting adds any value.

Towing mileage at 10 MPG for a 15K load isn't so bad, methinks ... did you try it at 2k revs in 5th? Maybe not so bad?? OR, slow down to 60 and smell the roses ... though even at that speed, I can't believe you'll see 12.8 very often with 15k behind.

Also, not sure why you're shifting out of Tow/Haul. Once it shifts into 6-locked, your mileage in T/H will be identical to standard-stock. If the TCM won't let it shift into 6th gear at 65mph in T/H, it belongs in 5th, prolly due to your air resistance and weight. Try finding a mileage sweet-spot in 5th? Might not be any worse. Let those computers work for ya, but also remember, "If you wanna build a fire, you need to burn some wood." If you coax it into 6th when it doesn't wanna be there, be ready for a trans problem.

If you're freaked about the Quad, sell it and get the EFI V-2. That'll be about $1000 for the EFI, net of selling the Quad ($300?). Then get the DashHawk or Insight so you can monitor what's happening (add $400), and get the TransGo Jr for about $350, installed.

If the Ferd's towing economy was so much better, maybe you can swap to get it back. ;)

Hey thanks guys for the info!! I was not bragging on the F350 I was just stating what it got as a comparison. I assumed and we all know what that means!! that I would be getting comparable mileage with the D-max . So I'll wait until Quad gets the stock tune DPF delete tune fixed and I'll try that next time , leaving it in T/H mode. Please any other tips or knowledge will be greatly appreciated. I really do like my truck I guess if we were paying $1.35 a gallon none of us would care what they got for mileage!

Oil Bastards anyway.................................:mad::mad:: mad:

Quadzilla's update of July 1, 2008 was specifically to correct Stock tune with NO-DPF.

:)

Also, some interesting towing comments from elsewhere in the Forum.

Orig thread (http://www.dieselplace.com/forum/newreply.php?do=newreply&p=2738001)
Sorry to hear you are having problems.... before you jump off the blue end have you seen the fuel mileage they are getting with the 6.4's ? There are lots of 07 / 08 6.4 F350 and 250's at all the Chevy dealers in my area with less than 10K on them that were traded in due to fuel mileage alone...

Orig thread (http://www.dieselplace.com/forum/showthread.php?t=252447&page=2)
Ain't nobody going to get 12MPG towing a trailer at 70 MPH with trucks this powerful. Maybe you get it from the 5.9L Cummins but that is a different animal.

The difference between 60 MPH and 70 MPH in Aerodynamic HP is huge. Very significant even from 65 to 70 MPH. If your towing a 5'er or trailer keep it right at 62 to 63 on the highway ....

Do you still have the DPF fuel injector installed?

anybody found out what this is??????

cujo489Quote:
Originally Posted by corrado-correr http://www.dieselplace.com/forum/images/buttons/viewpost.gif (http://www.dieselplace.com/forum/showthread.php?p=2737196#post2737196)
Do you still have the DPF fuel injector installed?

anybody found out what this is??????

Its the piece right before the muffler bearing.

Its the piece right before the muffler bearing.
And right after the flux capacitor

My uncle has a new ford diesel and pulls a 28ft. cattle trailer. He is working with other guys pulling the same trailers and the ford, dodge and gm all get the same mileage... 9-10 mpg hauling 26k combined. These are all stock trucks. I don't think there is much difference between the makes.


I just took a trip all interstate traveling 70-75mph and I got 17 mpg. I was happy with that. However, I pull a 13k trailer every day and I get 10mpg. This is about .5 better than I got with my stock LLY.

The fact of the matter is, if you are pulling a heavy trailer, the mileage will be around 10.