I have been through some htos,the plug is so freaking sensitive.The brisk is a good plug and has held up pretty well so far.I dont know if i will ever use the hto again just because of the price.
While at idle, or when you rev it some? Some popping is normal at cold startup (and you shouldn't really be revving a cold engine anyway...not saying that you were)it backfires once in a while only when first started.
That's actually pretty normal when the exhaust is fully broken in (20k miles+).when I leave the house the car feels sluggish then a slight backfire and then everything is good. This only happens once in a while, but only when I don't let the car warm up a bit.
This is actually what it does and only when its colder out. I start driving away, then the car goes into a mode where it feels like its going to die, so give it a little gas to keep it from dying and thats where it backfires. Its not a huge backfire but I can feel and hear it. After it backfires once everything is good to go.If it's an actual backfire and the car bucks from it, then it's not normal
How long have you had them in there? I don't do any racing just very spirited driving around town.might be time to replace them i can feel a slight stumble in just criusing or when part throttle
Good to know, thanks.For those members who commented on putting anti-seize on the threads....... don't do it. The spark plugs call for a dry torque spec of 23 to 27 lb/ft. By applying anti-seize to the threads, this will cause you to over-tighten the sparkplug which could lead to a broken plug, cracked plug or a stripped head. Only apply a very thin coating to the shell portion of the plug.