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TekScrew · 08-25-2011, 10:37 PM

Ok I know that a non-fouler is used to trick your ECM into thinking your O2 sensor is reading correct if you've modified your exhaust. But I have never actualy seen one. Is it a spacer that you thread into the O2 sensor bung to pull the sensor out of the exhaust stream a little, or is it a resister of sorts that plugs in between the sensor and the wiring harness. Does any one have any pics of one, or can someone explain how they work. My CEL just came on and I'm exploring my options. I'm not ready for a tune yet.

08-25-2011, 10:37 PM	#1
TekScrew Drives: 2010 Rally Yellow 2LT/RS Join Date: Feb 2011 Location: Canton, MI. Posts: 9 View My Garage	What exactly is a non-fouler? Ok I know that a non-fouler is used to trick your ECM into thinking your O2 sensor is reading correct if you've modified your exhaust. But I have never actualy seen one. Is it a spacer that you thread into the O2 sensor bung to pull the sensor out of the exhaust stream a little, or is it a resister of sorts that plugs in between the sensor and the wiring harness. Does any one have any pics of one, or can someone explain how they work. My CEL just came on and I'm exploring my options. I'm not ready for a tune yet.