I was thinking about adding a performance chip to my truck. Jet performance makes one, I was wondering if anyone has added a chip to their 4.2, and if it made any difference to the horsepower?

 

While I have had two 4.2 Fords..one a 97,and now my 07,and Love the bugger,it is not a powerhouse.Ive loaded down the 97 with more than it was ever supposed to take,and never missed a beat.
Adding a performance chip most probably wont make a huge difference,and likely decrease the mileage,and reliability.
These engines are "taxed" enough in a full size truck,and when you put an automatic behind it(as my 07 is) its doing all it can do to maintain interstate speeds.
I suggest that if you want more spunk,you look into a swap to the 4.6 or bigger v-8.
I know this probably isnt what youre looking to hear,but in my opinion its a waste of money,and will likely make your ride less reliable in the long run.

 

Hi fender72
Give us a call if your interested in some enhanced performance from your 4.2..