I have been looking at getting the FICM/ECM tuned by PHP to try to increase my mpg or getting a SCT with custom tunes to increase my mpg. I dont really want a lot of HP but getting a few more mpg would be great. I drive my truck daily to work and put a lot of miles on it weekly. I can currently get 14-15mpg on the highway now and would love to get 18 or so mpg. I have read that the SCT with custom tunes will get a few mpg and I have also read that tuning the FICM will get a few miles. I also know that getting either one may also not change what I am getting, but what do you guys think is a better option for the mpg?
The current strategy on my truck is VXBC9N8. I am leaning towards the SCT just becuase it does give extra HP and mpg and also that if I have to take it into the dealer and they reflash it I am not out the cost of the FICM tuning and the SCT will still work. So what do you guys think it better. One thing that I would like to get rid of with the FICM tuning is the injectors running after I shut the truck off.
Thanks for everything,