I had been working on a device that alters the signals from the coolant sensor, and air charge sensor. It was never completed, only because of time, or rather the lack of it. It will be completed, the idea works, I've already tried it. Currently, I have been force feeding myself all the data on EEC-IV computor systems that I find. I have found lots of folks who are quite knowlegeable on EEC-IV, just do a search on 'eec-iv' and see what I mean. I have been building a database of ecm numbers, cals, etc, and collecting info on how ther are calibrated. To date I have an 87 Bronco II that has been run, and quite well I might add, on an 86 Ranger 2.9 4x4 ecm, and now is running an ecm off an Aerostar 3.0. They really seem to perk it up, driveability is vastly improved. The Aerostar ecm has better convertor lockup strategy. I am soon going to try an ecm off a Taurus 3.0 and if it runs ok, move to a later model Taurus 3.0 SEFI. I am brainstorming an easy sequential fuel system with mass air sensor for the 2.9. This is not my wild idea tho, it was hatched from a question posted on Kunz Corner, by a fellow who has done a bit of thinking on the subject. If some one happens to have a 3.oSEFI ecm laying around, collecting dust, I will be needing one soon.
I frequent 'Kunz Corner' and the 'Ranger Tech Board' a lot, and those guys are great. They post things that get a gear head's brain to thumping. Pat has quite a ranger himself. Bob Marrs has done a mass air conversion on a Bronco II. If anyone out there has any data on the differences in the calibrations of these ecm's I'd like to hear about it.
Feel free to e-mail me with questions, comments, or any tips on things you've done to perk an EFI system up.