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Old 01-23-2013, 02:13 PM   #4
P.Huynh
Scooby Newbie
 
Member#: 285150
Join Date: Jun 2011
Chapter/Region: Tri-State
Location: Philadelphia, PA
Vehicle:
2003 WRX
MBP

Default

It depends on what kind of misfire it is. But yes it is best to shut it down if it is misfiring.

I just thought that it only misfired when it is cold and stops when it warms up. Well now I know that's not the case.

One more thing.. did you clear the dtcs before you swap the coils? Since you stated that it only misfired on cyl#2 and when you swapped it with coil cyl#4 you had misfire codes for those 2 cylinders. Just make sure you clear it so it's not showing you some stored codes.
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