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tirwin tirwin is offline
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Join Date: Feb 2011
Location: The Forgotten Coast
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Had another thought.

A quick check would be to test the O2 sensor relay under the passenger seat. Not a bad idea to have a spare in the glove box anyway. You can test the relay to see if it trips. That is what controls the FV duty cycle. Maybe the old relay is failing intermittently.
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'83 911 SC 3.0 coupe (NA)

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Old 04-05-2019, 10:12 AM
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