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Must replace catalytic converter. What to do? V70-XC70

posted by  KlausC on  Wed Dec 23 21:28 CST 2020
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last visit: Fri Oct 24 10:15 CST 2014
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87 octane is fine, so long as you do not exceed 4,000 rpm under boost. You have a low pressure turbo that kicks in at 1200 rpm, which means that your compression gets above 11:1. The 87 octane burns hotter than 91 octane, which could have resulted in a burned valve. Using 'hotter' spark plugs can also contribute.

This should not be a problem with the NA engines as the compression ratio is constant.

Go for that O2 spacer in the rear. That will take the sensor out of the exhaust stream and get rid of your CEL. The front O2 sensor is the one that does all of the work anyway.
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Keeping it running is better than buying new






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New Must replace catalytic converter. What to do? [V70-XC70]
posted by  someone claiming to be Hugh  on Fri Aug 21 10:29 CST 2020 >


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