Well if you're saying that replacing the ECM made things worse, then you should reverse that and re-install your old one.
Once you've done that, you'll have to subscribe to ALLDATA DIY
and follow the diagnostic procedure for harness faults and possible short circuits. If certain circuits in the Datalink connector are grounded, this fault 1330 will set. Your problem could be related to a bad connector or a faulty ground.
ALLDATA is only $26 for the year and you can use it all year long for any other repairs you have on your car. It's a good deal.