Quote:
Originally Posted by old blue
so by shrouding both,they would both see less oxygen then adjust fuel to get back to proper ratio but readings shrouded (leaner).
i currently have a computerchip on the iat sensor (warmer reading)
50% blocked iac port (to lower high idle)
still want to put in hotter thermostat
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the scond O2 sensor is there only to determine if the cat is functioning properly, so I'd do the front sensor and then see if the car throw a code. If it does, you can then add the second shroud, or look for a cat MIL eliminator to wire inline with the O2 element.