I was looking at pictures of the V12 engine found in the Toyota Century. Then I noticed the spark plug/coil arrangement: Interesting.
Denso IKH24 plugs gapped to 0.024". 6,900 miles. APR Stage 2 tune. Only issue was CEL error when we installed the Unitronic downpipe and flashed to the stage 2 tune. After troubleshooting and contacting APR, they had my shop re-flash to a stage 2 beta file, no more CEL error.
IS38 APR tune with Denso IKH24 plugs, no brainer cheap insurance.
I did swap in Denso IKH24 at APR recommendation. Runs nice and have no issues to share
Had these on my MKV and they made the car smoother too.
after installing the new plugs: 1- yes, the idle went down to around 780 (from 820-840) 2- the needle is rock steady.. you reeeeaaally have to fixate on it to see any fluctuation at all... 3- this is the weird one: power is smoother. Not "more power", but what I used to call "silky acceleration" when I raced Formula 5 years ago. hard to explain other than to say that the car outputs the same power without the drama, smooth... BTW, my car has 2100 miles on it.
Mine came out the box .028 and I left them as is. The plugs are 1 step colder so its already a plus. The car does run smoother through the rpm and does idle smoother.
I've had a slightly rough idle since my can was new (about 6500 miles now) Got an APR stage 1 tune a few months back and of course the idle was still rough. Finally got around to replacing the stock spark plugs with the APR recommended Denso IKH24 spark plugs and..... My idle is so damn smooth now I can't even feel the engine is on. This is what i expect the idle to be like on a new car but this being my 3rd 2.0T from the VAG family i know the idle is a little rough some times.
Currently just swapped to Denso's IK20 like 2 months ago. They run pretty good. But now its mid summer over here and the car runs a little bit underpowered at those high temps.
I tried the denso IK20 and had nothing but misfires.
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