Operation CHARM
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Mercury
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1989
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Tracer L4-1589cc 1.6L SOHC
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Repair and Diagnosis
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Powertrain Management
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Testing and Inspection
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Pinpoint Tests
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Pinpoint Tests
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HE - EGO Sensor Feedback
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HE7 - HE8
HE7 - HE8
Pinpoint Test HE7 & HE8 - EGO Sensor: