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New 4.2 v6 problems

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Old Jul 27, 2014 | 12:43 PM
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Shaymus1968
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Default New 4.2 v6 problems
Put new motor in , went to start and it has backfiring through the exaust. Does any one know how I can resolve this?
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Old Jul 27, 2014 | 07:19 PM
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Plug wires are on it wrong or timing chain installed incorrectly.
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Old Jul 27, 2014 | 07:19 PM
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Could be Mass airflow sensor also make sure it's plugged in.
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