I believe the '90 and '91 ECUs are interchangeable - the ad I posted says the same ECU is used '90 through '93, but I can't verify that (yet - CAPS CD on the way <img src="/forums/images/graemlins/kewl.gif" alt="" />). IF there were CA and Federal models for those years, it would be necessary to stick to the correct designation.

Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum