Unit started surging slightly, with small voltage variance on "A" TPS signal (readable in control head diagnostics mode). Replaced TPS and it ran OK for a bit, then surging came back with a vengeance, with voltage at idle surging from 0.3V to 4.5V, all over the board. Multiple codes thrown. Not really a parts changer myself, but does this seem like a VCM issue or a wiring issue? Wiggled harness everywhere with no change noted.
Thanks.
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