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using predator to know if 02's are good

This is a discussion on using predator to know if 02's are good within the Computer & Tuning forums, part of the LSx Technical Help Section category; I got a rough idle and power loss in closed loop and want to know what to look for with ...

  1. #1
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    2002, CAMARO Z28

    using predator to know if 02's are good

    I got a rough idle and power loss in closed loop and want to know what to look for with my predator to know if there fine. I have no codes.

  2. #2
    Senior Member mrr23's Avatar
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    dark bowling green
    2000 corvette

    use the scanner to see if the o2 numbers are moving around alot.

  3. #3
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    They move around constantly and seem fine according to what I've read but I have this closed loop issue. Gas mileage hasn't changed one bit since this all started.

  4. #4
    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    another thing to watch on the O2's is for them "flat lining". I caught a bad O2 on my buddies vette this way. His O2's looked fine except every now and then one would drop and hang at 450mv for a few seconds and then go back to normal. That's where it comes in really handy having something that records data so you can look at things over and over. What do your fuel trims look like?

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    Fuel trims are negative around 6 off throttle and 2 crusing and 0 at wot as they should.

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    After more readings I found that the passenger rear 02 will stay locked at times for a few secs.

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