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O2 - replace it or not? 200

First look at the fuel pressure regulator, do you smell gas in the vacuum line attached to the front of the FPR? Do you smell gas on the engine oil dipstick? If so this means the FPR's diaphragm has failed.

If the o2 sensor is over 60K miles old it should be replaced, go to autozone ($40) and get a Bosch 13913 sensor and splice on the Volvo connector.
Dan






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