Discussion:
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.
Showing items 1 - 1 of 1 results.
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

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

Fact of the week
According to studies published in the English Journal of Medicine, the impact of daylight savings is revealed by a 24% increase in heart attacks on the Monday following the spring shift forward. When clocks move back in autumn, heart attacks drop by about 21%, suggesting that loss of sleep is an important driver.
Upcoming industry events …
December 4–7, 2025 - Goyang, Korea, Republic Of
March 10-12, 2026 - Hong Kong, Hong Kong
June 30-July 2, 2026 - Birmingham, United Kingdom
TCM FD115-3
Yokohama, Japan
Used - Sale
Mitsubishi FD200
Yokohama, Japan
Used - Sale
Upcoming industry events …
December 4–7, 2025 - Goyang, Korea, Republic Of
March 10-12, 2026 - Hong Kong, Hong Kong
June 30-July 2, 2026 - Birmingham, United Kingdom
Fact of the week
According to studies published in the English Journal of Medicine, the impact of daylight savings is revealed by a 24% increase in heart attacks on the Monday following the spring shift forward. When clocks move back in autumn, heart attacks drop by about 21%, suggesting that loss of sleep is an important driver.