Also another cheap upgrade is....
Switching from 17lb injectors to 19lb ford injectors. It's a direct drop in replacement and gives your little 2.5 better
fuel delivery due to the increase in preasure as well as a 4 pintel (port) design. The stock 17lb injectors only have
one pintel. It allows your motor to perform better at the higher rpms when the ECU leans out the fuel delivery. This is
above 3200 rpms. Remember your power band on the little 2.5L is 2800-to-3500rpms. When revving the motor to pass
on the highway or climbing hills it really pays off. The motor keeps pulling all the way through 5000-to-5500 rpms. WoW!
At lower rpms you can enjoy a much smother and I do mean MUCH smother idol and a faster throttle response. I do suggest
you also do the 4.0 TB upgrade at the same time to get the full benefit out of it. I also tossed my stock muffler and replaced
it with a glasspack. I did some experimenting with the exhaust. I removed everything and ran it for awhile. Loss of power
and way too loud. Next I put back in the stock Cat. The power came back and much quieter but still to raspy and not toned
down enough. The glass pack toned it down and gave it a better sound with no flow restrictions. I'm very happy with the sound
and performance of this set up. Believe me, I'm 41 and don't like loud vehicles. You would think the glasspack would be
too loud but in reality the cat does most of the quiting and the the glasspack tones it.
I bought all my upgrades off ebay. The injectors were from a Donner Volvo. I got 5 (Volvo's are 5 cyl, I got a spare LOL)
19 lb injectors shipped to my door for $12.20. The 4.0 Throttle Body was $29.99 + $7.95 S+H ($37.94) The glasspack was
19.99 at a local parts store. Money well spent IMO. The bet $70.13 I spent on my Jeep besides regearing.
Some say the the ECU relearns the extra fuel and Air intake. I agree to a point. I does relearn the extra capacities and has
them available when needed and also adjusts to the new air and fuel mixture that is also available but it does NOT go back to
stock. I have had min on now for a better part of 6 weeks and it has been well over 50 warm up/start cycles and I still have
all the benefits of these upgrades.