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1st, Are you sure this truck is an ECS version?
Usually the O2 sensor itself is not what is bad, but the correctly reading o2 sensor see a 'bad' reading due to lack of good tuneup or other failure like a clogged catalytic converter.
what made you decide to try and set the air fuel ratio (this is actually something the engine control is going to change while running with respect to changing inputs)?

next, let me ask how you like using the Toyota analyzer, and do you think it is worth it? (and may I ask where you got yours?)
  • Posted 4 Oct 2014 07:55
  • Modified 4 Oct 2014 07:58 by poster
  • By edward_t
  • joined 5 Mar'08 - 2,334 messages
  • South Carolina, United States
"it's not rocket surgery"

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Fact of the week
Foundling hatches are safe, anonymous drop-off points for unwanted infants, allowing parents in crisis a way to surrender a baby safely without fear of punishment, ensuring the child is rescued and cared for. The concept started in the 12th century, was abandoned in the late 19th century, then reintroduced in 1952. It has since been adopted in many countries.