Bringing back this thread i started a few months ago. I replaced my plugs shortly after this incident with denso irridium plugs (hold on...) and ignition solutions plasma coils. I honestly notice no realy difference in performance with these mods, although my fuel economy did improve by 1.2mpg according to the obc.
I did a trackday at buttonwillow, no misses or issues, problem solved... but wait, it's not.
Last night, bedding in new pads and rotors, temp in the mid 70'sF. After my third slowdown, back in second, moderate acceleration, at around 4k rpm, misfire, ses light... ****. shut off, restart all is fine, and i drive the heck out of the car for the next 15 minutes, wot, 7k rpm, etc trying to get it to happen again, it doesn't. Peak reader says cyl 1 misfire.
I pulled the plugs today, looked carefully at the wiring, boots etc. All looked perfect. Because of the tales of horror and woe regarding non-oe plugs, i reinstalled a set of 5k mile old bmw/ngks, just for the heck of it. Interestingly, throttle responce seems a little sharper with the oe plugs, vs the irridiums.
Ok, the real reason i brought this back up was this other thread:
Read post number 8, by Pong. He had a misfire associated with brake pad bedding. My initial misfires at sears point were consistantly right after turn 7, a heavy braking hairpin...
What could cause a misfire after braking?
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