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Usally if you have engine miss you have a code multiple missfire with 303 & 304. Since you have moved the Injectors around its not bad injectors. Try moving the plugs around to see if any change. Next thing in line is to do compresson ckeck to see if 3&4 are in line with the rest of the cylinders. Might pull the valve cover and see if the rockers are working right. Last it could be a bad pcm.
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