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Know good waveforms
- tim.smith1
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- The_Floss
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- Unwaxed with a hint of peppermint
6 years 7 months ago - 6 years 7 months ago #34615
by The_Floss
Replied by The_Floss on topic Know good waveforms
I've attached a comparison of a known good cat (2006 Toyota Sienna) with a dead cat (2003 Toyota Camry) for the exact same route at approximately the same speeds and driving conditions.
The top is the O2 data for the good cat, and the bottom is for the dead one.
Both cars have upstream A/F Sensors, and fuel trims below 4% at all loads.
-Cheers
EDIT: I noticed that you couldn't see the values of the y axis with the low resolution, so I've added the upper and lower bounds for all 3 data PIDs, as well as the mid value for O2 output in large text. Hope that helps.
The top is the O2 data for the good cat, and the bottom is for the dead one.
Both cars have upstream A/F Sensors, and fuel trims below 4% at all loads.
-Cheers
EDIT: I noticed that you couldn't see the values of the y axis with the low resolution, so I've added the upper and lower bounds for all 3 data PIDs, as well as the mid value for O2 output in large text. Hope that helps.
Last edit: 6 years 7 months ago by The_Floss.
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