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Sent you a PM.

I missed your statement about the TSP reading .15 volts. I would perform the TSP test, it will confirm if the ECM is bad. Here is a link for the test;...

Another option is to disconnect the O2 harness completely (to avoid firing the ECM), install the A9P computer for troubleshooting. This will help you determine if it is the ECM. One last step before...