Ive ran Beru ultra copper core for a couple months now and they are one step colder. I honestly dont even check gap on them and my shit runs smooth.
Pros: runs smooth
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i just put the densos in my '17 alltrack with a stage 1 tune and they run noticeably smoother than stock. i gapped them to 0.026" before install. it didn't seem like plugs would be that important for a stage 1 tune so i've been surprised.
Pros: runs noticeably smoother
Vehicle:
Volkswagen
Yeah, I use NGK laser iridium. I got a friend that has a m6, m5 v10, and uses those, it's good
Pros: it's good
Vehicle:
BMW
Ngk's. First thing i did was get the original plugs out of my beamers and put in the ngk ones. Widely considered one of the best plugs for your engine.
Pros: best plugs for engine
Your misfire could be bad plugs, from looking at these pictures your plug gaps look massive. NGKs are good and motorcraft is also good and I wanna say cheaper from RockAuto.
Pros: good plugs, cheaper
Cons: plug gaps massive
Vehicle:
Ford Mustang
I just changed my plugs at 75,000 miles...I was impressed as to how clean the plugs were and the color. Looks good. The gap was still .030 as the new ones were (VW 06K905601K). Definitely could have gone much longer but it's an easy replacement.
Pros: clean plugs, good color
NGK BKUR6ET-10, stock number 2397. With every other car I've owned, the first symptom of failing plugs is missing at higher rpms. In the AEG engine, the first symptom is that it gets hard to start. Do you find that too?
Pros: failing plugs hard to start
Cons: missing at higher rpms
Vehicle:
Volkswagen Jetta
Part number: 2397
Denso or ngk. Bosch at worst. I would recommend against the off brand in your photo.
Pros: Denso or NGK
Cons: Bosch at worst
Local mechanic used an Autolite plug, not Honda-recommended NGK. Misfires stopped for a month, then happened twice more. I have since discovered this brand does not run well in a Honda engine.
Pros: misfires stopped for a month
Cons: misfires returned, does not run well
Vehicle:
Honda Pilot
I changed my plugs to autolite because I had never heard anything bad about them. I replaced them after 3 weeks due to misfires, put another set of autolites in and it ran fine for 2 weeks. Started misfiring again and swapped in a set of NGK's, no problems since.
Pros: ran fine for weeks
Cons: caused misfires
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