Looking to change my plugs because my truck is idling rough. Any suggestions?
Is it normal for ford spec to be .32 but when you pull the plugs they range from .35-42?
Did you check/reset your gap before you loaded your tune?Been thinking about buying a set of plugs for mine, upper rpms it has a slight stumble and power delivery isn't so smooth. Anybody going with a colder plug for the higher boost from the tunes? Or has any tuner notice a difference tuning with a colder plug?