My 500 sport rocked copper cores good for 30k and at 38k, when I bought it, was misfiring like mad and stumbled a ton at startup, swapped $14 a pop NGK Iridium IX Plug Number DCPR7EIX and runs like a dream
Get ngk cold start and gap them to .28? If I remember correctly for stock ..don't just drop them in
I ordered NGK plugs gapped to factory spec (.032). I didn't pre-check them, but I late went back and checked them and they were all in spec.
Autolite plugs work fine in my Toyotas.
replace the plugs with NGK only... I did this on 21 cars and every time the car started working as a new one. All cars were Audi of course.
I just changed all four NGK platinum spark plugs on my soul. My car’s driving good. No engine skips.
I bought 4 new NGK plugs (part #92411). Installed them and it ran perfect.
I have the ruthenium. Bought pregapped from Mountune. They are fine. They work no noticable change. I've put about 200k miles on them between by ST and RS and changed every 50k miles with no issues (both tuned and stock).
autolite, worst spark plugs in the world. I'm tired of customers asking for cheaper plugs and they cause misfire
It has 90k miles and we've been having issues with spark plugs. 3 months ago we replaced them after a cylinder 2 misfire. About a month ago same thing. Both times they looked terrible. Diode was all corroded and the threads had oil on them. Last night on my way to work cylinder 2 misfire came back. Anyway, I always use iridium ngk plugs as thats what's recommended but they are getting expensive having to buy them every month or 2.
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