PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

does this look like bad o2's?

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Old Jan 22, 2010 | 09:33 PM
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Default does this look like bad o2's?

can some one tell me if this looks like i have bad o2's?
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Old Jan 23, 2010 | 11:18 AM
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anyone?
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Old Jan 23, 2010 | 11:45 AM
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I dont have hp tuners I have EFI live, but if your car is running like crap and getting bad milage thats a good indicator. All you need to do is watch the O2 voltage and it nees to bounce from at least 100-900 and back again real fast, if its slow or sticking on one number then its bad.
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Old Jan 23, 2010 | 02:21 PM
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They look ok on the log.
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Old Jan 23, 2010 | 08:11 PM
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Originally Posted by MUSTANGBRKR02
They look ok on the log.
i dont know what you were looking at, but the switching is vitrually non existent...OP, do you have LT Fuel Trim turned off ?
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Old Jan 23, 2010 | 11:51 PM
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no i dont have lt fuel trim turned off, they are the bosch rear vette o2's with about 25,000 on them...... So they do look bad then?
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Old Jan 24, 2010 | 12:21 AM
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somethings screwy...O2's are very "lazy"...LTFT at the end was -5.5 on B1 and +11 on B2 (maybe an exhaust leak).....are your headers painted ?
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Old Jan 24, 2010 | 01:06 AM
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no not painted, and i dont think there is an exhaust leak, atleast it doesnt look like there is an exhaust leak, had the car on a lift not very long ago and didnt see anything
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Old Jan 24, 2010 | 06:57 AM
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Originally Posted by oange ss
i dont know what you were looking at, but the switching is vitrually non existent...OP, do you have LT Fuel Trim turned off ?
Haha yeah your right I was looking at my log. I had two scanners opened. Oops but mine look good.
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Old Jan 24, 2010 | 11:11 AM
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Originally Posted by MUSTANGBRKR02
Haha yeah your right I was looking at my log. I had two scanners opened. Oops but mine look good.

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Old Jan 24, 2010 | 02:03 PM
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ok so if i dont have an exhaust leak, go head and change them then? i know people say those bosch vette o2's are hit or miss with long tubes on an f-body. should i go with densos? seems like those get better feedback?
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