04 Cobra running rich

SvtCobra0404

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Oct 9, 2017
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111
Location
New York
hi there I have a 04 cobra. Mods are intake, off road x and catback exhaust. The car is running a little rich, my front o2 are plugged in but my rears are not. Driver side I have my wideband hooked up and passenger side I have blocked it off. Maybe I have an exhaust leak? Causing it to go rich? I only have a very small idle surge. And if it does get affected with load, (turn ac on or press the brake very hard) could this be a failing IAC? I’ve checked for vacuum leaks but cannot find anything and I’m not leaning out on my wideband.
 

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