Spark plug color

jeff_yam

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Location
Quebec
Country
Canada
Snowmobile
2016 Viper LTX-LE
I have removed my spark plugs to verify if i'm running rich or lean since I have do airbox mod and installed MBRP trail can. It seem to be ok, anyone can confirm?
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Thanks! I keep this PCV AFR table!

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Last edited:
Are they all same color. What map do u hav in ur pcv
 
All spark plug have the same color. I think its an Ulmer map that i'm running with autotune.

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Yes but engine is popping/backfire when I decelerate when it is very cold outside.

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