ECM upgrade (1227730) for stock 2.8 (Page 50/107) JazzMan JAN 30, 01:10 PM Does TunerCat allow full access to all the tables in the 7730, or just selected ones? I've had bad luck using software that was crippled in this area before. Also, what are some good links to info on tuning the 7730? I've got an EPROM burner from Needham Micro already so don't mind fiddling around with my own chips. JazzMan Darth Fiero JAN 30, 01:51 PM quote Originally posted by JazzMan: Does TunerCat allow full access to all the tables in the 7730, or just selected ones? I've had bad luck using software that was crippled in this area before. Also, what are some good links to info on tuning the 7730? I've got an EPROM burner from Needham Micro already so don't mind fiddling around with my own chips. JazzMan ALL tuning software commercially available only gives you access to "selected" tables and constants. I haven't seen one tuning software program that gives you complete access to all tunable bits, constants, and tables used in any GM computer out of the box. Tunercat's software seems to give access to everything you need for tuning purposes; more so than other tuning software programs I have used. I think tunerpro does has some extra tables in their definition file that will allow you to change other things, but not all of it is "useful" for what you will need to do. The thing I like about tunercat is you can buy their definition file editor program that allows you to add access to tables you want to tune (but you will need a commented disassembly of the code mask so you know memory addresses of the tables you want to add). Such disassemblies are freely available for download on the internet. Pyrthian JAN 30, 02:34 PM quote Originally posted by Darth Fiero: What I usually do is stick one end of the pair of wires in a vice, and stick the other end into a cordless drill and tighten the chuck down. I then turn on the drill and allow the wires to twist nicely to the just before the point when they try curling up. After you remove the wiring from the drill/vise it may untwist some, but should still have a nice twist. If you don't twist your pair of wires well enough then they can be susceptible to EM interference from the secondary ignition system. -ryan ok, good - was just worried that the splices & the different guage wires may be a problem, or even the length. I could go shorter, but that would leave it outside the main harness, and close to a header. it is gonna be bundled with both the VSS & the alternator wires, then across with the injector wires - all of which I expect are pretty dang noisy. maybe I'll wrap it in tin foil after the twists..... Darth Fiero JAN 30, 03:29 PM quote Originally posted by Pyrthian: ok, good - was just worried that the splices & the different guage wires may be a problem, or even the length. I could go shorter, but that would leave it outside the main harness, and close to a header. it is gonna be bundled with both the VSS & the alternator wires, then across with the injector wires - all of which I expect are pretty dang noisy. maybe I'll wrap it in tin foil after the twists..... You shouldn't need to wrap it in foil or anything. Just make sure you get a good twist and keep it routed away from the spark plug wires. rjblaze FEB 04, 11:09 AM bump to keep alive Pyrthian FEB 04, 11:43 AM cold weather making it slow going - but - done with most my wiring - just removing wires from the harness now - like the A/C stuff. but, one thing I was wondering: Darth: the A/C request goes to the ECM - is it possible to have an "alternate" program fro A/C on & A/C off to have something like a "performance" code & "MPG" code? JazzMan FEB 04, 01:04 PM Doesn't the A/C request function just allow the ECM to proactively bump the RPM for compressor load instead of having to see the RPMs drop and play catchup with the idle air controller? JazzMan Pyrthian FEB 04, 01:31 PM quote Originally posted by JazzMan: Doesn't the A/C request function just allow the ECM to proactively bump the RPM for compressor load instead of having to see the RPMs drop and play catchup with the idle air controller? JazzMan not sure what it does - but, I assume it does something, and am wondering how adjustable that something is. Capt Fiero FEB 04, 01:49 PM If it is anything like the Caddy ECM (which it sounds very similar) The A/C on request does 3 things. Tells the Compressor to Engage, Bumps the base idle up, and turns the rad fan on. Even on the lowley stock Fiero ECM you can get the A/C on mode to increase the idle rpm. I had this function changed when I was in Vegas by a member of the Las Vegas Fiero club. So my 88GT 2.8 now idles at 1200rpms when the A/C is on. (blows colder and keeps the voltage higher) I keep reading about this 7730 ECM swap and keep thinking to myself. A pushrod 3.4 is about the only engine mod I can do to my 88GT and keep it Looking stock, which in turn would let me use the factory Camaro sensors and such. Hmm. Well I will keep reading this thread and thinking. Blacktree FEB 10, 11:24 AM Just out of curiosity, does the ECM pay attention to knock sensor input when in open-loop mode?