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Idle surging TPS "A" voltage surging

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.
  • Posted 15 Oct 2019 00:13
  • By Southernsurplus
  • joined 7 Feb'17 - 12 messages
  • Florida, United States
If you're gonna be dumb, you better be tough.
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What unit? Model number at least. Most likely is computer but they typically hold up well. Any chance it was introduced to static? Are you sure your 02 sensor aint giving mixed signal?
  • Posted 15 Oct 2019 22:55
  • By Goose
  • joined 9 Oct'19 - 4 messages
  • Pennsylvania, United States
Never stop trying
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