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Re: Troubleshooting 101
After looking at it a little more, the timing is being retarded (ESC is 4.4 to 5.4) which indicates a problem with the ESC module or knock sensor. This probably explains why the MAP reading is higher in the before case.
Interesting that it does not give you a knock count. I use WinALDL and it shows knock count but not timing.
//2000CAYukon
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