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I'm not seeing a ground at the EVR though? Should I try grounding it? At idle the + is constant at the EVR. When I raise the rpm (in park) there is no fluctuation of the voltage. This is why I made the assumption that the way the PCM engaged the EVR was through a ground. Vacuum at the EVR is solid. EGR side of EVR no vacuum. Vacuum lines all good as well.
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