Even pre-gapped plugs are not always precise. I always double check my plugs and they are off sometimes.NGK plugs for our cars come pre-gapped. Which plugs did you buy? As in the spark plug # code.
unless you are making mad power spark plugs dont matterwhich ngk plugs r better? iridium or platinum series? i got the iridium series ones but theres also iridum laser series. which ones r better?