I know this is on here somewhere but after 30 minutes looking I just want answers. I have a 2001 Cummins with 104,325 miles on it that is bone stock basically. The only modification I have done to it is I replaced the fuel pump with a Fass DDRP when the old one started failing. I know this gives me a little room for more HP but not a lot. What i am really looking for in a chip is one that will give me more MPG. My city driving ranges from 12.5 - 14 depending on my mood and weather (its 25 out right now). Freeway speeds of 62-67 I am getting 17 mpg. The truck is 4x4, stock tire size, and an automatic. I don't care about getting black smoke, burning tread off my brand new $1,000 tires, or looking to add any other performance parts. Just looking for a few more MPG's. I also tow a 700 lb (empty) trailer and never weighs over 2,000 lbs loaded - I just always wanted a Cummins since I first drove the second gen back in high school when they came out. Thanks for your help guys.
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