ManiacEvo

Sup guys,
recently installed new sparkplugs, NGK Iridium EVO 8 Spark Plugs BPR7EIX, http://www.lancershop.com/customer/p...?productid=335 , after maybe two weeks of driving ive been getting a misfire problem. My evo has catback, fuel pump, injectors, intake and some minor mods... Im just installing them not doing anything else like gapping or anything. Anyone know what the problem might be? or if these are the wrong plugs? Im confused

mhezz13

you need to gap them.

ManiacEvo

I hope thats the problem. how do you know that? do you know what its originally gapped to and what i should gap it to? appreciate the help.

Wiznaz

iTrader: (13)

First thing is to pull the plugs and make sure they shipped you the right plugs. Then check the gap which is not optional. The gap will definitely make a difference of misfiring or not.

Wiznaz

iTrader: (13)

I'm not sure what they come from out of the box but a starting point would be .026-.028