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Error code P0300 & P0304

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Old 07 Mar 2011, 05:18 pm
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Question Error code P0300 & P0304

I have an '07 PT turbo with about 106,000 miles and it's starting to run poorly. I checked the codes and found P0300 and P0304. Both indicate miss cylinder firings. I have replaced the plugs and the wires but it's still there. What might be the next logical step? I'm thinking the PCM.
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Old 07 Mar 2011, 05:28 pm
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Location: oak creek, wi
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Default Re: Error code P0300 & P0304

i presume you did the timing belt/water pump change due at around 100,000 mi.
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