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S/C spark plugs

DERRIXRYD

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Been away for a bit...my son drives the X now and it has been gumming up
spark plugs. It will throw a random misfire code so checking the plugs, they are black. Using the IKH22.
Should I go to a hotter plug to burn more fuel?
 

DERRIXRYD

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It seems to be running rich for some reason.
 

Coupe

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This is pretty basic, but is the air filter clean?

Any codes thrown?
 

DERRIXRYD

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Yes, it's clean.
The vacuum hose was cracked and has been fixed.
It seems to keep throwing a random misfire code.
I've changed coils and plugs but seems to be running rich.
 

DERRIXRYD

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I do have those big ass injectors that everyone said to go with...should I drop back to the 425's?
 
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