Reviewed By RICHARD J (Parachute, CO) Reviewed for a 2005 GMC Savana —7/13/2014 9:25 PM
Big difference in power. I get 3 to 4 mpg more when using performance level.
Reviewed By Arthur B (Memphis, TN) —4/17/2009 9:25 AM
The Max Energy Programmer really helps with acceleration. I also opted to crisp up my transmission shifts by 50%. Checking the computer codes is really neat also. You can google the codes and find out exactly what is being stored in your computer. The only thing that I can say that is disapointing is that the increase in gas mileage is very nominal, maybe 1 mpg.
Reviewed By Luis F S (El Paso, TX) Reviewed for a 1998 Ford Expedition —4/10/2009 8:50 PM
Just bought it to improve my Transmission Shift changes when towing, or alone w/ my Family..( Ford Expedition V8 4.6L ) Just 30 secs. after i installed the Performance program immediately worked better and smoother, I had already a PIFK k&N High Flow Air Filter system and a Throttle Body spacer. Modifying the Computer was the best think i could do..Now Runs better more power and Saved a lot of Gas, i made a more efficient Engine..My best investment for this Truck....