Does Anybody Know The Difference In The E.c.u. For 20o4 Tacoma 3.4 V6 ...wanted To Add 7th Injector But Hear No Can Do ??? Change To 03 Ecu ... Why Would Toyota Change It Anyway...fuel Economy,power/or Lack There Of...noticed That My 04 Seems Slower Than My 97 Tacoma 3.4... Thank You In Advance For Your Response In This Matter

Huh, I don't know myself, but if you look at www.customtacos.com and their forums there is a guy with the name, Gadget who knows all about that stuff.