Intermittent Engine Misfire with codes P0300 P0303 P0305

EZT

Always best to purchase from reputable sources especially if it seems like a really good deal.

Averying

I got some knock off spark plugs off eBay a few years ago when I was more naive lol

I stick to rockauto for most parts now. Best prices by far


Sent from my iPhone using Tapatalk

__________________
2009 Sport Touring | Platinum Graphite | GTM Stage 1 Supercharger | BC BR Coilovers | Hotchkis Swaybar | Z1 FUCAs | AME TM-02 Wheels | Z1 2-piece Front Rotors | Z1 Clutch & Flywheel | Invidia Gemini Catback | GTM Resonated Test Pipes

Smokey Nagata

I've got a similar horror story of purchasing "authentic" NGK Iridiums for my 08 TL that turned out to be duds about a year later down the road. Caused all kinds of misfires and the car ran like absolute crap. After investing too much $$ into coil packs from different brands (oem,NGK,Import Direct)that remedied the problem temporarily. I smartened up and pulled the plugs I had replaced only 12 months prior and Wallah !!! they were worn to nubs and black as soot covered in carbon and unburnt gas. I think running like this for an extended period of time played a role in my rings failing at or around 212,000m killed my motor prematurely (for a Honda at least). I'm still saddened by it till this day but you live and you learn