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Old 05-30-2008, 08:46 AM   #30
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Join Date: Nov 2006
Location: Southern ID
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Quote:
Originally Posted by Jaxonalden
Topless,

I have a question for about the O2 sensors. These headers have ports for the two sensors to screw back into. Obviously the primary sensor will read normal but the secondary will be off because of the elimination of the cat. What do you think the DME will think with that info?
The secondary O2 sensors read emissions only and don't affect DME tuning. The best solution is to get them in the exhaust flow after a set of cats and eliminate all error codes. Some guys just mickey mouse zip tie the secondaries up under the car to eliminate a CEL. This works for a while. If something happens and the cats get fouled they will not know and engine damage can occur. See other posts where this happened ending in total engine loss. An expensive lesson in hot rodding.
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Last edited by Topless; 05-30-2008 at 08:50 AM.
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