DAD users group discussion thread

[interfan]

EJ:

That code is not in the book, so I would assume it doesn't apply. From a discussion I had at work with a guy from Daimler, MB is a parts bin company and uses the same ecu in many vehicles. This code probably applies to some other vehicle with different equipment and operating conditions. The guy from Daimler told me that there are quite a few "bugs" in ecu software and the guys at the dealers know to just ignore the buggy codes.

Get "The Book" it makes life a helluva lot easier with all the codes because you can know not only what codes apply, but also by the process of elimination, what codes don't.

Marty

[carrothers]

Andy, I have a 2006 Adventurous Road Trek on a 2005 Sprinter chassis. I took it into the Dodge dealer today to have a computer check of the shifting and he says it checks out ok. Took it on a test drive and it shifted ok. The issue I have is it seems to get progressively worse later in the day (after say 300-400 miles) on a long trip. I find myself having to let us on the accellerator and allow it to shift, or I bump the gear shift know + sign and it shifts. I seem to be in the "sweet spot" at around 65 mph and around 2200. When it doesn't shift it's revving around 2600.

Dodge tech thinks it simply because the Road Trek is heavy? What are your thoughts? I can't wait until I get my DAD unit and I can run some tests myself. Thanks for any input you may have.

[jim_wildgoose]

I usually sit on the side and just lurk but being the owner of a 2006 roadtrek on a 2005 sprinter chassis(33000 miles), I'll just give you some of my observations. I have a scangauge II on the unit and drive mostly in Florida/Georgia think flat. the usual RPM for me is 2650 to 2700 at 62 mph. at 68 to 70 mph the rpm is around 2850+ rpm LOD 58-64. Just did a trip from Fla-Ala-Tenn-Ga with air on and got 21 mpg with speed on interstate between 62-68 mph. doing the backhills of Alabama Huntsville to Anniston afternoon/evening outside air temp 86-80 degrees f i experienced what i would consider a slow downshift when hill climbing. LOD would be in the high 80's and ultimately to 99 with rpm in 2200-2500 rpm range. I would force downshift and rpm would go to 3000-3200 and LOD would drop to 70's-80's range. even when i would push shifter to allow upshift it would rev to over 3000 before shifting. i cannot remember ever having an up shift occur via tapping the shifter without the control module wanting it to occur. i.e. the rpm range was where even i thought a shift should occur. that number seems to be around 3000 rpm. hope you get your DAD soon. I would also highly recommend the scangauge II or similar device for insight into your engine operation. I would ask how you are getting your rpm. off dash or via obd port. hope this helps Jim

and a

Originally Posted by carrothers

Andy, I have a 2006 Adventurous Road Trek on a 2005 Sprinter chassis. I took it into the Dodge dealer today to have a computer check of the shifting and he says it checks out ok. Took it on a test drive and it shifted ok. The issue I have is it seems to get progressively worse later in the day (after say 300-400 miles) on a long trip. I find myself having to let us on the accellerator and allow it to shift, or I bump the gear shift know + sign and it shifts. I seem to be in the "sweet spot" at around 65 mph and around 2200. When it doesn't shift it's revving around 2600.

Dodge tech thinks it simply because the Road Trek is heavy? What are your thoughts? I can't wait until I get my DAD unit and I can run some tests myself. Thanks for any input you may have.

[carrothers]

Thanks Jim for the input...no I'm just eyeballing the RPM off the dash tach. When I first got the Road Trek I drove it "light" loaded with mimimal stores from Washington State to Houston and averaged between 24-25 mpg. After I started putting all the "stuff" in the coach I now get around 22 mpg. I notice the Treker is very sensitive to speed. If I'm not in a hurry and stay in the low 60's with around 2100-2200 rpm I seem to get much better mileage (closer to 23-24)....pushing it up around 65-70 drops it down to 22. Loading it up with family and luggage it drops down to 20-21.

I posted some pictures on the Road Trek thread on this formum of some of the modifications I have made. Interested in seeing what everyone is doing to individualize their rigs. Pete

[metalartgate]

Question on
>Special Functions
>Component/Vehicle Coding
>ESP(ABS) Parametrization

When I read code I get back that it is a 3550mm wheel base YET I have a 4025mm wheel base.
If I change it and press the <Write Code> button after it comes back I press <Read Code> and it is back at 3550mm.
Is this something DAD can not change and if not do I need to be concerned that it is set for the incorrect wheel base?