03-09-2020, 07:17 PM
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#18 (permalink)
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Enthusiast Member
Join Date: Aug 2013
Location: CT
Posts: 254
Drives: g37
Rep Power: 12
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Quote:
Originally Posted by Gooch
Late post but you need the upstream O2 sensors for sure. Downstream sensors only monitor cat health and have been known to potentially cause idling issues in BP kits. You can easily remove these (Sasha includes plugs) but consult your tuner first as he has to disable the CEL and some tuners like the downstream O2 sensors for doing their stuff. Go OEM for sure.
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yea i just bought two new downstream 02's. I dont use them at all but since i had to do the work might as well put them in. I have the 02's turned off in the computer so no worries there.
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