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El Duderino
Join Date: Feb 2011
Location: The Forgotten Coast
Posts: 5,843
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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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There are those who call me... Tim
'83 911 SC 3.0 coupe (NA)
You can't buy happiness, but you can buy car parts which is kind of the same thing.
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