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Old 10-12-2015, 06:04 AM
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Join Date: Dec 2010
Location: Fairfax, VA
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jfoj is on a distinguished road
This is not likely an O2 sensor issue, trust me.

If you are only using Torque Free, move on from Torque Free and spend the $3.99 and buy OBDFusion, it is far better than Torque Pro as far as I am concerned.

I need to see Freeze Frame data Logged data will tell me WAY more than you can convey.

This problem is likely a Lean problem which will be clearly shown with the data.

Lean conditions are more often than not due to vacuum and/or crankcase air leaks. Occasionally a soft failing fuel pump could be an issue as well.

For vacuum or crankcase air leaks, smoke testing is the easiest way to figure out if and where a leak is.

Here some examples of ways to smoke test:

https://www.youtube.com/watch?v=AsgB9eBl58I

https://www.youtube.com/watch?v=PnU-SY6egr4

https://www.youtube.com/watch?v=zMok2y05jNE
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