Ok, just so ya'll know, I DID search the site, Google and Dogpile already. Where the heck is the ECU??? I have a 1991 240SX KA24DE Hatchback, and everything I find says that itwould be by the passenger's feet. I looked, and unless ECU's got a lot smaller since I last checked, it's not there. There is, however, a black box under the driver's seat, but that only has one red LED and it won't switch modes like the ECU is supposed to. Any ideas?