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After searching for,and trying a few, milage improving mods - I'd say my smarty Jr. has provided a solid 1. 5-2 mpg (maybe more) for city driving for sure. I have a spreasheet tracking fuel economy (for every tank - yes, I have issues:-) of my truck since new, and the driving conditions...

... my neighbour's '07 5. 9L had a battery melt down on him a few weeks back, and took some wiring etc. with it. My other neighbour, a diesel performance guy, said there was a TSB/DTC or something out for it - I looked into it being concerned about my truck, but the only thing I saw was for...

Done - thanks Bob! Randy

Sorry for potentially stupid question - but where do you download the beta software for the SMarty Jr? I looked on madselectronics web site and only see the software release in December '07(I think it's the orignal software... ), at MADS Electronics - Smarty - CaTCHER - Download Thanks.

My truck has a howl to it as well when letting off the fuel - in nuetral, park and in drive - it's worse when cold as well. I'm thinking turbo, intercooler leak, or exhaust resonation but..... there are other similar threads on this as well. Does yours make the noise in neutral and park?

car-man1, please let us know if turbo replacement resolves your problem. I have same howl when the engine winds down - it does it in drive, park and neutral - I'm no mechanic and don't have very much knowledge regarding these trucks, but I think that must leave the howing up to the...