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Q:

i have replaced the camshaft sensor, both o2 sensors, and the coolant temp senso on 2003 Mazda Mazda6

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
and the codes po340 and po128 keep returning. the engine surges a little and at hwy miles mph 65 to 70 the rpms go crazy but nothing major drivibility wise. can someone please help???
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