# Where's the A/F probe, before or after the cat. conv.

Posted by MIKE (93VE) on September 14, 2004 at 16:28:34: In Reply to: What can make me run incredibly rich? 10.3:1 AFR!!! --> posted by Aaron on September 14, 2004 at 08:54:52: If the probe is after the cat and your MPG hasn't changed I wouldn't be too worried about the A/F readings. If the probe is before the cat maybe you're starting to show signs of carbon build-up in the combustion chamber Do you have a seperate probe for the A/F readings are did you tap into the OEM o2 sensor? MIKE Replys: I will still answer this even though I am at your house using your computer ... Aaron (92 SE Auto) 12:50:53 9/16/2004 (0)

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: If the probe is after the cat and your MPG hasn't changed I wouldn't be too worried about the A/F readings. : If the probe is before the cat maybe you're starting to show signs of carbon build-up in the combustion chamber : Do you have a seperate probe for the A/F readings are did you tap into the OEM o2 sensor? : MIKE