Misfire on cylinder 2

Tiny
RANDY SHARP
  • MEMBER
  • 2003 FORD FOCUS
  • 65,000 MILES
I have a misfire code P0302 coil on plug system cylinder 2.I swapped coil 2 with coil 3. Now can I get a scanner and erase the existing misfire no.2 code and see if it moves to no.3. Then I will know if it is the coil?
Friday, May 24th, 2013 AT 7:48 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,879 POSTS
That's pretty much what we would do, but to go further, swap the coil with one cylinder, spark plug with a different cylinder, and you can even swap the injector with a third cylinder. If you don't have access to a scanner, a less desirable way to erase codes is to disconnect the negative battery cable for a minute, or just watch if a misfire code sets for a different cylinder.
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Friday, May 24th, 2013 AT 8:28 PM

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