'99 7.3 Powerstroke with bully dog gt tuner - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 05-25-2014, 12:21 PM Thread Starter
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'99 7.3 Powerstroke with bully dog gt tuner

I put a Bully Dog GT tuner in my stock '99, along with an AFE intake and a 4" exhaust in an effort to improve my fuel economy (I was getting 15 - 16.5 mpg). I have not noticed any difference. The first tank of diesel after install was 15.7 mpg. I drive very conservatively and don't put my foot in the throttle. I notice the extra horsepower but no difference in mileage. I am an amateur with the diesel performance parts. Anybody have any insight they could provide? Thanks!
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post #2 of 3 Old 05-25-2014, 04:35 PM
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Smaller tires, lower the truck, drive like a sissy.

These things will increase your mileage. Performance parts simply will not ever pay for themselves in a mpg return.

PIS 230/80's, Van Turbo with EBPV, BD Billet Wheel
Lots of money spent at RiffRaff
Dual SD fuel pumps, in tank mods, CNC Fab bowl retain kit. SDK Tunes. Isspro.
Still pretty slow, just less slow now.
Originally Posted by peixinho View Post
I love finally having my truck back... that 7.3 dog that I was driving was just not cutting it.
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post #3 of 3 Old 05-25-2014, 05:18 PM
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better mpg

You can clean the evbp sensor or replace it. Also there is a tube that leads to the sensor that needs to be cleaned as well. Some people say use weed eater string. I would be worried about it breaking inside tube. Instead use guitar/piano strings on a drill. Be easy with speed of drill.
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7.3 diesel f350 , fuel economy , performace parts

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