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02 signal not fluctuating
Mike,
The only time you will see the voltage "fluctuate" ( back and forth) is when the system is in closed loop. If you have already verified at the test port that the system pulses the FV at 65% duty cycle (more like 58 dwell) open loop (default), the relay and ECU are powered and working. You need to focus on why it does not go into closed loop above 59F, beginning with the 15C switch. The 35C switch has nothing to do with this, it is for the cold acceleration enrichment system and it is located on the breather cover.
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Paul
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