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Important info on O2 Sensors


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i confirm this theory is right as i have changed my pre-cat and the engine came to life!!!!!!........lot more better and my car has about 80K........I don't think you need to change to post-cat unless you have problems with cel's.........i have a sport cat with 200 cell and i do not have any problems with the old post-cat lamda

You may say that post-cat O2 sensors shouldn't change, but I was at a CAT manufacturers today for work and they confirmed 100% that if you change a CAT, you SHOULD can't ALL of the O2 sensors in the exhaust.

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