Electrical 2016 Mustang GT unable to communicate with the PCM

Elper

New Member
Apr 14, 2019
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Israel
Hi,

I have 2016 Mustang GT with new Aluminator crate engine installed. (New engine harness).
The engine is working fine but we have misfires in high RPM, while trying to investigate with have noticed that we cannot communicate with the PCM (All other modules can be communicated fine).
What can be the problem?

Thanks
 
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