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Old 08-11-2022, 05:25 PM   #11 (permalink)
fuentes2s
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Join Date: Nov 2021
Location: Los Angeles
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Drives: 2012 Nismo 370z PW
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Quote:
Originally Posted by THE BULL View Post
Correct.

You should be able to monitor your A/Fs to find out if they are operating at all.
Going from a normal sound to a weird sound can be a leak, it can also mean that the cats are done and they messed up the A/Fs as they went.

With the cats clogged the A/Fs will take a beating many times overheating, you can monitor catalytic temp through the A/F sensors.

Any issues with these sensors will usually send the engine into default fuel parameters which mean pig rich airfuels.

I suggest you monitor the A/F readings then take off your exhaust and check those cats.

Here are the A/F Sensors readings. Volts are low im assuming? Going to replace both upstream sensors
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