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Check for Vac. leaks, and the Fuel Trim Valves. You can Ohm them out should be 26+/- 2 ohms. If you can blow air through them then they are faulty and stuck open.

The fault code reads as Pre-Catalyst 02 sensor indicates extended lean operation. This is odd as the system is designed to run rich when something goes wrong with the fuel system.
  • Posted 5 Oct 2017 23:15
  • By sirthor1881
  • joined 15 Mar'11 - 24 messages
  • Georgia, United States

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