I have 2003 ford focus 2.0 SOHC SPI. I am not getting a service engine light and the car has a bad missfire. It idles really rough and when you put it in gear it pretty much dies every time. I checked to make sure the wires and plugs were in the right firing order and they were so I replaced the plugs, wires and coil and then double checked to make sure I had the right firing order but nothing has changed. What are a few things that could be wrong with it?
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The coil mounting bracket is fine and not sure how that affects the missfire.
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