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The compression of a four cylinder engine is 140, 95, 135, and 138 PSI, respectively. Technician A says that the number two cylinder (95) has a bad valve. Technician B says that the number two cylinder has carbon under the valve seat. Who is correct?

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1. The compression of a four cylinder engine is 140, 95, 135, and 138 PSI, respectively. Technician A says that the number two cylinder (95) has a bad valve. Technician B says that the number two cylinder has carbon under the valve seat. Who is correct?





 
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