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Old 03-28-2008, 10:10 AM   #7
tholyoak
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Join Date: Jan 2006
Location: Glen Allen, ON
Posts: 314
Unless you reprogram the DME the car will trip a CEL. The OBDII program looks at the before and after cat readings to determine catalytic efficiency.
The ROW program or a custom program could be used to ignore the secondary O2 sensors and just use the primary sensors for mixture adjustment.


Todd

Quote:
Originally Posted by Automon
I live in Michigan and we do not have to have our cars smog tested. Would the sound and breathing improve if i pull off the catalytic converters? or would my service engine light come on?
Has anyone tried this ?
Regards,
Automon
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