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Old 12-30-2011, 04:07 PM   #2
BR3W CITY
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Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
Re: O2 sensor questions keep or remove

You need the front 02's, but you can loose the rears and have the CEL turned off in the tune. With no front 02, the computer hunt around trying to maintain a stoich balance, but have no way to know that it does. Run like crap.

I'm not 100% sure on temp sensor, but if you are going to have the ecm control the fans, I imagine you would need it.
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