1970 CUDA - 6.4L GEN III Engine SWAP - WOT Issues

Diego García said
Finally I bought the Witech 2.0 scanner and tried to connect to the ECU, but the software show me the following error message and I can't access to any menu to do the Pedal learn procedure. Could you give me some advice? As you can see in the pictures bellow, the scanner complete de connectivity procedure but can't access to the ECU. Could be a damage ECU?

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I just remembered I had a similar problem with mine. 1 of many. It was a ground problem. The trans ground was loose and my battery was in the trunk and I had to add a ground from the battery the chassis(bumper bracket bolts). You may need more grounds.