Okay, disconnect the MAF, reset the ECM by disconnecting the battery (neg cable) and then turning on the headlight switch (to drain the capacitors) for 10 minutes. Reattach the battery cable, and run the KOEO self test with the MAF unplugged. You have short in the ECM harness that may have already damaged the ECM. It's possible that it could be in the MAF harness. Post the codes you get, and we'll go from there.
Take care,
-Chris
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