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View Full Version : ? about EFI Tune for 07 5.9


pete2833
03-04-2012, 12:32 PM
I have a stock 07 5.9 with a smarty Jr on it and a 4" exhaust with no cat and muffler. Trying to get the most in town MPGs out of the truck. Can an EFI tune hep with this ? Thanks Pete

triton
03-04-2012, 01:13 PM
I'm sure one of the many tuners will tell you better but, I'd say yes. A tune can be built with mileage in mind. I think it comes at a little bit of a sacrifice in performance though. It's hard to have both. A lot will have to do with components on your truck too...i,e. tires/inflation, clean filters...etc.

holsky
03-04-2012, 02:13 PM
It's just sooo hard to get good mpg's with town driving... So you don't do any highway traveling at all??

2007 5.9
03-04-2012, 02:30 PM
You can get improved mpg in town...but driving style plays a MAJOR role in getting it dialed in.

If your a "jackrabbit" then it's near impossible...but if you do or can learn to drive with a soft foot, then getting better mpg in town can be achieved.

Question...what are you getting now, and what is your goal?