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usmcchevy · 12-30-2011, 05:10 PM

You need the front O2s unless you plan to run a speed density tune which will eliminate all your O2s and you MAF. Talk to your tuner before you think about going this route.

You need the temp sensor, without it your PCM will think it is VERY cold and run very rich.

12-30-2011, 05:10 PM	#3
usmcchevy Has more rust than truck... Join Date: Apr 2005 Location: Ivanhoe, MN Posts: 2,421	Re: O2 sensor questions keep or remove You need the front O2s unless you plan to run a speed density tune which will eliminate all your O2s and you MAF. Talk to your tuner before you think about going this route. You need the temp sensor, without it your PCM will think it is VERY cold and run very rich. __________________ 1972 Custom/10 SWB, 4.8/4l80e Build thread LSx Swap FAQ index