As was said, chips go back to the 80`s and early 90`s. reflashing PCM`s (tuners) is the way to go now. there are certain companies that specialize in certain manuf. 5STAR Tuning specializes in Ford gas motors, Black Bear specializes in GM gas motors (both are highly recommended!). not sure who handles Mopar, but I`m sure there is someone out there who is the best.
I have 5 star and am extremely happy with them!
02 Ford Excursion V-10 4.30 gears 5 Star Tuner Y-pipe mod Hellwig sway bar Rear Airbags
Prodigy and Dual Cam
07 Cherokee 32B
Better to have a bad day of camping than a good day at work!