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Old 02-20-2015, 10:12 PM   #1
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P300, P301 and P305

Hi everyone,

I had these misfire codes that came on all together, it came on like 4 times and only while I'm driving on highway speed, same codes exactly every time, it will turn off by itself the next day. I have no codes while driving in the city.

I read in more than one place that cylinder 1and 5 fires at the same time because they share the same tower in the coil pack.

So do you think the coil pack is the problem? Or it could be something else. I replaced the Spark plugs, and wires, in addition to the coil pack two years ago with one from American muscle.


Thank you in advance.


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Old 02-21-2015, 07:29 AM   #2
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If what you said about one and five being connected in some way that is where I would start is with the coilpack.

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Old 02-21-2015, 08:15 AM   #3
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I still have the factory coil pack, I can reinstall it and drive it again on the highway, I forgot to say also that sometimes I have an engine shake while driving on the highway too.


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