Misfire on different plugs

[MIG]

I know carbon build up on the 3.6L can cause miss fires at cold, it might something to do with that, have you ever had it wallnut blasted?

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[bigdaddy786]

I know carbon build up on the 3.6L can cause miss fires at cold, it might something to do with that, have you ever had it wallnut blasted?

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Not as yet but in search in finding a company to do it properly. my concern is why it misfires on the ngk plugs not the bosch?