Spark plug NGK or AC DELCO

Ditch these plugs and pick up some NGK's gapped to .028 and your misfires should go away. If the misfires are still present, start looking over your coil harness with a fine tooth comb and look for any cracks.

Usually the rule of thumb i've seen is the more expensive plug you use in your vrt, the ****tier its gonna run. NGK BKR7E's gapped to .022 and mine runs grand.

Last night I finally decided to trash the bosch spark plugs and installed some new NGK spark plugs and while I had my upper intake manifold off I bought a couple cans of throttle body cleaner and gave my upper intake manifold out and also gave my throttle body a real good clean. It was covered in sludge. But anyways after I sea foamed it a couple weeks ago, changed the oil and filter, spark plugs and cleaned the throttle body last night my car is running like a champ and doesn't feel boggy anymore.

im driving a mk4 1.8t just had unitronic 1+ tune done last saturday car is still running good and havent even gotten colder sparks in yet. i bought ngk bkr7e plugs, one step colder.

i run DCPR9EIX.. boost is at 24psi when i race.. ive only changed them out after my first 25 or so passes.. have another 25 on my current ones.. no issues yet

After a few hours o cleaning and taking things apart, I came across the following: All in all, 3 weeks after getting everything cleaned up and the plugs, air filter, and oil changed, the car is back to making 34mph on the highway at 80, and before it was 27mpg at best.

Don't bother with platinums. Just change out BKR6e plugs every 3-6k and you'll be good. They are dirt cheap and run the best.

Also, the best plugs for the car are NGK BKR7E's gapped at .032\" for unchipped and .028\" for chipped. They don't last as long since they're copper but at $2.39 a plug it's easy to afford to change them every other oil change. May not last the longest but they definitely run the best.

I get a random misfire at idle, but nothing in boost surprisingly. Hey, I'm just goin with what works. And Im running 19 lbs on a T3/T4.

NGK Iridiums.... Not right for the ABA, and really a waste of money unless you are running a hopped up ignition, anyway.