DaveFromColorado Posted March 25, 2004 Report Share Posted March 25, 2004 anyone have a diagram for the pinouts on the GM ECM's? I know they're pretty much all the same for the cars and all they did was change the eeprom, but I was wondering what all the pinouts were for, I'm looking at setting up an aftermarket computer if mine is unable to tune in the way that I want it to. thanks in advance --Dave.. P.S if no one has the pinouts, once I do find them, I'll post 'em for everyone. Quote Link to comment Share on other sites More sharing options...
Guest TurboSedan Posted March 25, 2004 Report Share Posted March 25, 2004 I'm looking at setting up an aftermarket computer if mine is unable to tune in the way that I want it to. thanks in advance --Dave.. P.S if no one has the pinouts, once I do find them, I'll post 'em for everyone. not sure if this will help at all: http://www.cruzers.com/~ludis/quadplugecm.html i would go to the library and check out wiring diagrams in a Mitchell manual. i have found ECM pinouts for my Cutlass there and i photocopied wiring diagrams for the entire car. have you checked out gmpcm.com? joshua Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted March 25, 2004 Author Report Share Posted March 25, 2004 Oooo.. those are resources I haven't tapped yet, thanks for the pointers! --Dave. Quote Link to comment Share on other sites More sharing options...
will Posted March 25, 2004 Report Share Posted March 25, 2004 i cant get my 96 lq1 reprogramed can you or do you know how to get this done ? Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted March 26, 2004 Author Report Share Posted March 26, 2004 well with the OBDii junk usually you have to flash thru the connector, I could perhaps get it flashed out of the car for you, I can call and get some prices for you. --Dave. Quote Link to comment Share on other sites More sharing options...
Guest TurboSedan Posted March 26, 2004 Report Share Posted March 26, 2004 could you maybe ditch the OBD-2 engine management system and run an OBD-1 wiring harness and ECM/custom EPROM instead? joshua Quote Link to comment Share on other sites More sharing options...
DaveFromColorado Posted March 26, 2004 Author Report Share Posted March 26, 2004 the problem with downgrading from OBD-2 to OBD-1 is that it "removes, disables or otherwise renders inoperative" some of the emissions equipment so they'd be able to tow your car untill you are able to get it fixed at a qualified service station. I'm still gonna do some research to find out if I am able to make an EEPROM for the obd-2 stuff --Dave Quote Link to comment Share on other sites More sharing options...
will Posted March 26, 2004 Report Share Posted March 26, 2004 dave that would be great i have been tring to get my pcm tuned since i did my swap if you could e-mail me or some thing thanks Quote Link to comment Share on other sites More sharing options...
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