Connected once with no problems. Went to connect again and it wouldnt sync up, then the ecm took a **** so i figured maybe thats why it wouldnt connect. Got a new ecm and hooked it all up...still wouldnt datalog. I am using the 10 k resistor and have a cable from aldlcable.com. I hooked up the cable to my 92 car (minus the 10k ) and it worked fine so its no the laptop or the cable...any ideas? Its driving me insane. I am using datamaster as the datalogging software as well..

 

ah nevermind..managed to get it to work

 

hey, i have the same problem, i just finished building my harness and i built to interface cables... i powered up my ecm and hooked up the homemade cable to it, it worked fine the first time.... i went to use it again and nothing... i tried the other cable and still wouldnt work.... what the hell i did all the pin outs at the ecm and they are all good.... so what's the trick???

 

well in my case it was just a bad 12v source to the cable...