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