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Old 09-16-2014, 06:57 PM   #1 (permalink)
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Angry 2007 Forenza multiple misfire codes

Having issues with 2007 Forenza. Multiple codes: P0300, P0301, P0304. I read that each of these codes have the same symptom/causes, but how do I narrow that long list down to fix this car? Any ideas of what this is? Symptoms include: sluggish acceleration, shaking/trembling, rattling noise.
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Old 09-27-2014, 01:13 PM   #2 (permalink)
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I fixed my 2004 Forenza P0300 by replacement of ignition coil. May be you can try to buy a new ignition coil from Ebay just cost 20-40 USD.
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Old 09-27-2014, 01:39 PM   #3 (permalink)
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0300 series codes are "misfires" usually due to faulty coils,P0300 is "multiple random misfire", P0301 is cyl 1 misfire, P0304 is cyl 4 misfire

First thing is swap plugs from cyls 1 and 4 into 2 and 3 and see if the codes change to P0302 and P0303, if they do, dead plugs, if the codes stay the same, dead coil(s)
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Old 10-04-2014, 07:27 PM   #4 (permalink)
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if that doesnt work let us know how the car is acting. its posible something else could be causing the missfire
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