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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

When to replace O2 sensors.

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Old 08-07-2010, 08:14 PM
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Default When to replace O2 sensors.
Is there a certain time/mileage or does a SES light go off? Doing LTs fairly soon and would like to know about when to replace.
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Old 08-07-2010, 08:39 PM
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Dont change o2s until way after longtubes are installed especially if the LTs are coated or the o2s will get ruined.......

Most experience low rpm low speed studdering etc.
Fuel mileage decreases
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Old 08-07-2010, 10:07 PM
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Figured but wondering why? So does that mean my stockers will be ruined by the coating?
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Old 08-07-2010, 10:16 PM
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Originally Posted by Bowtie Boy
Figured but wondering why? So does that mean my stockers will be ruined by the coating?
Some people have problems some don't. I never had any issues with mine after I installed coated LT's and I put my o2's back in for the first startup.
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