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a cyinder 1 misfire after plug and coil-on-plug change


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helped a friend just get a 2002 Subaru OBW H6 VDC

 

lucky for him it came up with a cylinder #1 misfire like a couple weeks after he got it. :rolleyes:

 

swapped coil pack and installed a new spark plug:

 

still cylinder #1 misfire.

 

what's next?

 

i'm thinking Seafoam in the gas and probably fuel injector?

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